System and method for reducing noise in a recording receiver
First Claim
1. A method for recording data from a wireless communication transmission with a receiver, the method comprising:
- disabling at least a portion of non-essential electronics when the receiver is in a receive mode;
starting a capture sequence for the receiver in the receive mode;
receiving the wireless communication transmission during the receive mode;
identifying an received in-phase (I) signal and a received quadrature-phase (Q) signal from the received wireless communication transmission during the receive mode, wherein the received in-phase (I) signal and the received quadrature phase (Q) signal correspond to a complex base-band signal;
digitizing the complex base-band signal from a captured transmission during the receive mode, wherein the digitized complex base-band signal comprises a digitized in-phase (I) signal and a digitized quadrature phase (Q) signal; and
storing the digitized complex base-band signal in a buffer without further processing such that the effects of noise in the digitized complex base-band signal are minimized by disabling the at least a portion of the non-essential electronics while the digitized complex base-band signal is received.
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Accused Products
Abstract
An apparatus and method is related to wireless communication devices with a reduced-noise recording receiver. The recording receiver receives a transmitted signal, converts the received signal to a digital base-band signal and stores the digitized base-band signal in a buffer for subsequent processing. The stored digital signals are subsequently processed to recover the transmitted data signal. The overall signal integrity in the receiver is improved by performing signal processing after reception is complete. The IF processing section of the receiver includes a frequency band translation section. The frequency band translation section translates the frequency band of the IF signal into a non-harmonically related frequency band. Since the IF signal is in an unrelated frequency band, data can be recovered from the transmission signal with improved signal-to-noise characteristics. At least a portion of the non-essential electronics are disabled during reception to avoid additional interference and sources of noise.
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Citations
20 Claims
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1. A method for recording data from a wireless communication transmission with a receiver, the method comprising:
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disabling at least a portion of non-essential electronics when the receiver is in a receive mode;
starting a capture sequence for the receiver in the receive mode;
receiving the wireless communication transmission during the receive mode;
identifying an received in-phase (I) signal and a received quadrature-phase (Q) signal from the received wireless communication transmission during the receive mode, wherein the received in-phase (I) signal and the received quadrature phase (Q) signal correspond to a complex base-band signal;
digitizing the complex base-band signal from a captured transmission during the receive mode, wherein the digitized complex base-band signal comprises a digitized in-phase (I) signal and a digitized quadrature phase (Q) signal; and
storing the digitized complex base-band signal in a buffer without further processing such that the effects of noise in the digitized complex base-band signal are minimized by disabling the at least a portion of the non-essential electronics while the digitized complex base-band signal is received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for wireless communication, comprising:
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an antenna circuit that produces an RF signal in response to a FM signal that is in a particular frequency band;
an RF amplifier circuit is coupled to the antenna circuit and produces an amplified RF signal in response to the RF signal;
an IF signal processor circuit is coupled to the RF amplifier circuit and produces an IF signal in response to the amplified RF signal;
a base-band signal processor circuit is coupled to the IF signal processor circuit and produces a base-band signal in response to the IF signal;
a post detector processor circuit is coupled to the base-band signal processor circuit and produces two digital signals in response to the base-band signal, the two digital signals corresponding to a digitized I and Q base-band signal;
a buffer circuit is coupled to the post detector processor circuit and stores the digitized I and Q base-band signals when active, wherein the digitized I and Q base-band signals are stored in the buffer for post processing such that signal processing may be performed on the stored digitized I and Q base-band signals at a subsequent time after an entire transmission has been received; and
a control circuit that is arranged to;
disable at least a first portion of non-essential electronics when the apparatus is in a receive mode; and
enable at least a second portion of non-essential electronics when the apparatus is in another mode that is different from the receive mode. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. An apparatus for wireless communication in a watch having a watch band, comprising:
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an antenna that produces an RF signal in response to a FM signal that is in a particular frequency band, wherein the antenna is formed in the watch-band;
an RF amplifier is coupled to the antenna and produces an amplified RF signal in response to the RF signal;
an IF signal processor is coupled to the RF amplifier and produces an IF signal in response to the amplified RF signal;
a base-band signal processor is coupled to the IF signal processor and produces a base-band signal in response to the IF signal;
a post detector processor is coupled to the base-band signal processor and produces two digital signals in response to the base-band signal, the two digital signals corresponding to a digitized I and Q base-band signal;
a buffer is coupled to the post detector processor and stores the digitized I and Q base-band signals when active, wherein the digitized I and Q base-band signals are stored in the buffer for post processing such that signal processing may be performed on the stored digitized I and Q base-band signals at a subsequent time after an entire transmission has been received;
a means for selectively disabling non-essential portions of the apparatus when the apparatus is operated in a receive mode such that noise effects associated with the non-essential portions of the apparatus are mitigated; and
a means for selectively enabling non-essential portions of the apparatus when the apparatus is operated in another mode that is different from the receive mode. - View Dependent Claims (20)
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Specification