Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation
First Claim
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1. A wireless local area network (WLAN) device, comprising:
- a medium access control layer; and
a physical layer coupled to said medium access control layer, comprising;
a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises;
a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, wherein said frequency down-conversion module comprises a switch module and a storage element, wherein a first node of said switch module is coupled to a first node of said storage element, wherein said storage element comprises a capacitor, anda transmitter that transmits an output RF signal; and
a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer.
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Abstract
Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and filtering, and combinations and applications of same.
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Citations
57 Claims
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1. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, wherein said frequency down-conversion module comprises a switch module and a storage element, wherein a first node of said switch module is coupled to a first node of said storage element, wherein said storage element comprises a capacitor, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer. - View Dependent Claims (2, 3, 4, 5, 7, 24, 28, 30, 32, 38, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 56, 57)
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6. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a first frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said first frequency down-conversion module receives said input RF signal, wherein said first frequency down-conversion module down-converts said input RF signal according to a first control signal and outputs a first down-converted signal, wherein said receiver further comprises; a second frequency down-conversion module that receives said input RF signal, wherein said second frequency down-conversion module down-converts said input RF signal according to a second control signal and outputs a second down-converted signal; and an adder module that adds said second down-converted signal and said first down-converted signal and outputs a down-converted demodulated signal, wherein said first and said second frequency down-conversion modules each comprise a switch module and a storage element, wherein a first node of said each switch module is coupled to a node of the corresponding said each storage element, wherein said each storage element comprises a capacitor, wherein said each capacitor corresponding to said first and said second frequency down-conversion modules reduces a DC offset voltage in said first down-converted signal to produce a first reduced DC offset voltage and said second down-converted signal to produce a second reduced DC offset voltage, wherein said first and said second DC offset voltages are at least due to charge injection effects in said first and said second frequency down-conversion modules, respectively.
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8. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a first frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said first frequency down-conversion module receives said input RF signal, wherein said first frequency down-conversion module down-converts said input RF signal according to a first control signal and outputs a first down-converted signal; wherein said receiver further comprises; a second frequency down-conversion module that receives said input RF signal, wherein said second frequency down-conversion module down-converts said input RF signal according to a second control signal and outputs a second down-converted signal; a first adder module that adds said second down-converted signal and said first down-converted signal and outputs an I-phase demodulated signal; a third frequency down-conversion module that receives said input RF signal, wherein said third UFD frequency down-conversion module down-converts said input RF signal according to a third control signal and outputs a third down-converted signal; a fourth frequency down-conversion module that receives said input RF signal, wherein said fourth frequency down-conversion module down-converts said input RF signal according to a fourth control signal and outputs a fourth down-converted signal; and a second adder module that adds said fourth down-converted signal and said third down-converted signal and outputs a Q-phase demodulated signal. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said transmitter receives an information signal, wherein said information signal comprises an I baseband signal and a Q baseband signal, wherein said transmitter comprises; (1) a first modulator that receives said I baseband signal and outputs a modulated I phase signal; (2) a second modulator that receives said Q baseband signal and outputs a modulated Q phase signal; (3) first differential sampling means for sampling said modulated I phase signal according to a first control signal and a second control signal, to generate an I harmonically rich signal, wherein said second control signal is phase shifted relative to said first control signal; (4) second differential sampling means for sampling said modulated Q phase signal according to said first control signal and said second control signal, to generate a Q harmonically rich signal; (5) means for combining said I harmonically rich signal and said Q harmonically rich signal, to generate an I/Q harmonically rich signal, said I/Q harmonically rich signal having multiple harmonic images that contain amplitude and frequency information for reconstruction of the I and Q phase signals; wherein said first and second control signals have a period of TS so that said harmonic images repeat at multiples of 1/TS; wherein said first and second control signal comprise pulses that operate to improve energy transfer to a desired harmonic image in said corresponding I and Q harmonically rich signals; and wherein said output RF signal comprises said I/Q harmonically rich signal. - View Dependent Claims (52, 53)
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21. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal, and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said transmitter receives an information signal, wherein said transmitter comprises; a modulator that receives said information signal and outputs a modulated signal; a buffer/inverter, for receiving said modulated signal and generating an inverted modulated signal; a first controlled switch, coupled to an output of said buffer/inverter, said first controlled switch shunting said modulated signal to ground according to a first control signal, and resulting in a first harmonically rich signal; a second controlled switch coupled to a second output of said buffer/inverter, said second controlled switch shunting said inverted modulated signal to ground according to a second control signal, and resulting in a second harmonically rich signal; a combiner, coupled to an output of said first controlled switch and an output of said second controlled switch, said combiner combining said first harmonically rich signal and said second harmonically rich signal, resulting in a third harmonically rich signal; wherein said first control signal and said second control signal comprise pulses that operate to improve energy transfer to a desired harmonic in said third harmonically rich signal; wherein said first control signal and said second control signal are phase shifted with respect to each other; and wherein said output RF signal comprises said third harmonically rich signal. - View Dependent Claims (22, 23, 54, 55)
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25. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a direct sequence spread spectrum (DSSS) physical layer, wherein said input RF signal comprises a differential binary phase shift keying modulated signal or a differential quadrature phase shift keying modulated signal, wherein said receiver comprises a differential phase shift keying modulation receiver, wherein said differential phase shift keying modulation receiver receives said input RF signal and outputs a down-converted demodulated signal, and wherein said physical medium dependent sublayer further comprises; a de-spread correlator that receives said down-converted demodulated signal and receives an 11-bit Barker word, wherein said de-spread correlator outputs a de-spread signal; and a de-scrambler that receives said de-spread signal and outputs at least a portion of at least one PPDU frame.
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26. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal, and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a direct sequence spread spectrum (DSSS) physical layer, wherein said input RF signal comprises a differential binary phase shift keying modulated signal or a differential quadrature phase shift keying modulated signal, wherein said receiver comprises a differential phase shift keying modulation receiver, and wherein said physical medium dependent sublayer further comprises; a de-spread correlator that receives said input RF signal and receives an 11-bit Barker word, wherein said de-spread correlator outputs a de-spread signal; and a de-scrambler; wherein said differential phase shift keying modulation receiver receives said de-spread signal and outputs a down-converted demodulated signal; and wherein said de-scrambler receives said down-converted demodulated signal and outputs at least a portion of at least one PPDU frame.
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27. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a direct sequence spread spectrum (DSSS) physical layer, wherein said input RF signal comprises a differential binary phase shift keying modulated signal or a differential quadrature phase shift keying modulated signal, wherein said receiver comprises a combined differential phase shift keying (DPSK) modulation receiver and de-spread correlator, wherein said combined DPSK modulation receiver and de-spreader correlator receives said input RF signal and receives an 11-bit Barker word, wherein said combined DPSK modulation receiver and de-spread correlator outputs a demodulated/de-spread signal, wherein said physical medium dependent sublayer further comprises; a de-scrambler that receives said demodulated/de-spread signal and outputs at least a portion of at least one PPDU frame.
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29. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a direct sequence spread spectrum (DSSS) physical layer, wherein said output RF signal comprises a differential binary phase shift keying modulated signal or a differential quadrature phase shift keying modulated signal, wherein said transmitter comprises a differential phase shift keying modulation transmitter, and wherein said physical medium dependent sublayer further comprises; a scrambler that receives at least a portion of at least one PPDU frame and outputs a scrambled at least one PPDU frame portion; a modulo-2 adder that receives said scrambled at least one PPDU frame portion, wherein said modulo-2 adder receives an 11-bit Barker word, and wherein said scrambler outputs a spread signal; and a transmit mask filter that receives said spread signal and outputs a filtered signal; and wherein said differential phase shift keying modulation transmitter receives said filtered signal, wherein said differential phase shift keying modulation transmitter transmits said output RF signal.
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31. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a frequency hopping spread spectrum physical layer, wherein said input RF signal comprises a 2-level or 4-level Gaussian frequency shift keying modulated signal, wherein said receiver comprises a Gaussian frequency shift keying modulation receiver, wherein said Gaussian frequency shift keying modulation receiver receives said input RF signal, wherein said Gaussian frequency shift keying modulation receiver outputs a demodulated signal, wherein said physical medium dependent sublayer further comprises; a data de-whitener that receives said demodulated signal and outputs at least a portion of at least one PPDU frame.
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33. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a frequency hopping spread spectrum physical layer, wherein said output RF signal comprises a 2-level or 4-level Gaussian frequency shift keying modulated signal, wherein said transmitter comprises a Gaussian frequency shift keying modulation transmitter, wherein said physical medium dependent sublayer further comprises; a data whitener that receives at least a portion of at least one PPDU frame and outputs a whitened at least one PPDU frame portion; and a transmit Gaussian shaping filter that receives said at least one whitened at least one PPDU frame portion and outputs a filtered signal; wherein said Gaussian frequency shift keying modulation transmitter receives said filtered signal, wherein said Gaussian frequency shift keying modulation transmitter transmits said output RF signal. - View Dependent Claims (34, 35)
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36. A wireless local area network (WLAN) device, comprising:
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a medium access control layer, and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal, and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said receiver comprises a phase shift keying/quadrature amplitude modulation (PSK/QAM) receiver, wherein said PSK/QAM modulation receiver receives said RF input signal and outputs a demodulated signal, wherein said physical medium dependent sublayer further comprises; a fast Fourier transform (FFT) module that receives said demodulated signal and outputs a FFT module output signal; a bit de-interleaving and de-mapping module that receives said FFT module output signal and outputs an encoded at least one data frame; and a convolutional code decoder that receives said encoded at least one data frame and outputs at least a portion of at least one PPDU frame. - View Dependent Claims (37)
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39. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises an orthogonal frequency division multiplexing physical layer, wherein said output RF signal comprises a binary phase shift keying modulated signal, a quadrature phase shift keying modulated signal, a 16-QAM modulated signal, or a 64-QAM modulated signal, wherein said transmitter comprises a phase shift keying/quadrature amplitude modulation (PSK/QAM) transmitter, wherein said physical medium dependent sublayer further comprises; a convolutional encoder that receives at least a portion of at least a PPDU frame and outputs an encoded at least one PPDU frame portion; a bit interleaving and mapping module that receives said encoded at least one PPDU frame portion and outputs at least one bit interleaved and mapped signal; and an inverse fast Fourier transform (IFFT) module that receives said at least one bit interleaved and mapped signal and outputs an IFFT module output signal; and wherein said PSK/QAM modulation transmitter receives said IFFT module output signal and transmits said output RF signal.
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40. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a high rate direct sequence spread spectrum physical layer, wherein said transmitter comprises a phase shift keying (PSK) modulation transmitter, wherein said output RF signal comprises a packet binary convolutional coding modulated signal, wherein said physical medium dependent sublayer further comprises; a scrambler that receives at least a portion of at least one PPDU frame and outputs a scrambled at least one PPDU frame portion; a binary convolutional code encoder that receives said scrambled at least one PPDU frame portion and outputs an encoded signal; a cover code sequence generator that receives a 16-bit cover code seed and outputs a cover sequence; and a PSK cover code map module that receives said cover sequence and said encoded signal, and outputs a mapped signal; and wherein said PSK modulation transmitter receives said mapped signal, wherein said PSK modulation transmitter transmits said output RF signal.
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41. A wireless local area network (WLAN) device, comprising:
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a medium access control layer; and a physical layer coupled to said medium access control layer, comprising; a physical medium dependent sublayer, wherein said physical medium dependent sublayer comprises; a receiver that receives an input radio frequency (RF) signal, wherein said receiver comprises a frequency down-conversion module, and a transmitter that transmits an output RF signal; and a physical layer convergence procedure sublayer coupled to said physical medium dependent sublayer, wherein said physical layer convergence procedure sublayer controls frame exchange between said medium access control layer and said physical layer, wherein said physical layer comprises a high rate direct sequence spread spectrum physical layer, wherein said transmitter comprises a differential quadrature phase shift keying (DQPSK) modulation transmitter, wherein said output RF signal comprises a complementary code keying modulated signal, wherein said physical medium dependent sublayer further comprises; a scrambler that receives at least one data frame and outputs a scrambled at least one data frame; a data multiplexer that receives said scrambled at least one data frame, wherein said data multiplexer outputs a first multiplexed data portion and a second multiplexed data portion; and a complex code selector module that receives said first multiplexed data portion and outputs a selected code; and wherein said DQPSK modulation transmitter receives said selected code and said second multiplexed data portion, wherein said DQPSK modulation transmitter transmits said output RF signal.
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Specification