Methods and apparatuses for multimode Bluetooth and WLAN operation concurrently
First Claim
1. A receiver, comprising:
- a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein at least a portion of the first frequency band is within the second frequency band for a period of time, wherein the data in the second signal is encoded with an error correction code, and wherein the wireless interface performs amplification, down-conversion, filtering, and analog-to-digital conversion to obtain time-domain samples; and
a processing circuit configured to receive the time-domain samples and to convert the time-domain samples into a frequency domain signal, to decode the frequency domain signal thereby obtaining a decoded frequency domain signal, and to subtract the decoded frequency domain signal from the frequency domain signal thereby recovering the data in the first signal, wherein the processing circuit is configured to recover from the frequency domain signal both the data of the first signal and the data of the second signal during the period of time.
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Abstract
A wideband telecommunications device with narrow band support. The device may be a receiver having a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein the first frequency band is within the second frequency band. The receiver may also be a processing system configured to recover the data in the first signal from the combined first and second signals. The device may be a transmitter having a first signal source configured to provide a first signal having data in a first frequency band; a second signal source having a second frequency band, the first frequency band being within a sub-band of the second frequency band, wherein the second signal source is configured to provide a second signal having data in the second frequency band with no data in the sub-band of the second frequency band, a processing system configured to combine the first and second signals, and a wireless interface configured to transmit the combined first and second signal.
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Citations
22 Claims
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1. A receiver, comprising:
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a wireless interface configured to receive combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein at least a portion of the first frequency band is within the second frequency band for a period of time, wherein the data in the second signal is encoded with an error correction code, and wherein the wireless interface performs amplification, down-conversion, filtering, and analog-to-digital conversion to obtain time-domain samples; and a processing circuit configured to receive the time-domain samples and to convert the time-domain samples into a frequency domain signal, to decode the frequency domain signal thereby obtaining a decoded frequency domain signal, and to subtract the decoded frequency domain signal from the frequency domain signal thereby recovering the data in the first signal, wherein the processing circuit is configured to recover from the frequency domain signal both the data of the first signal and the data of the second signal during the period of time. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of communications, comprising:
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receiving combined first and second signals, the first signal having data in a first frequency band and the second signal having data in a second frequency band wider than the first frequency band, wherein at least a portion of the first frequency band is within the second frequency band for a period of time, wherein the second signal is encoded with an error correction code, and wherein the receiving also involves performing amplification, down-conversion, filtering, and analog-to-digital conversion to obtain time-domain samples; and recovering from a frequency domain signal both the data of the first signal and the data of the second signal during the period of time by; converting the time-domain samples into the frequency domain signal; decoding the frequency domain signal thereby generating a decoded frequency domain signal and thereby also recovering the data of the second signal; subtracting the decoded frequency domain signal from the frequency domain signal to obtain a subtractor output signal; and performing inverse fast Fourier transform (IFFT) processing on the subtractor output signal to recover the data of the first signal. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A non-transitory machine-readable medium comprising instructions executable by a processing system in a receiver, the receiver having a wireless interface configured to receive combined first and second signals, the first signal having first data in a first frequency band and the second signal having second data in a second frequency band wider than the first frequency band, wherein at least a portion of the first frequency band is within the second frequency band for a period of time, wherein the second signal is encoded with an error correction code, and wherein the wireless interface performs amplification, down-conversion, filtering, and analog-to-digital conversion to obtain time-domain samples, the instructions comprising code to:
control the receiver to;
a) convert the time-domain samples into a frequency domain signal, b) decode the frequency domain signal to obtain a decoded frequency domain signal comprising the second data, c) subtract the decoded frequency domain signal from the frequency domain signal to obtain a subtractor output signal, and d) perform inverse fast Fourier transform (IFFT) processing on the subtractor output signal to obtain the first data, wherein the first data and the second data are both recovered from the frequency domain signal during the period of time.
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19. A method comprising:
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(a) receiving a combined Radio Frequency (RF) signal on an antenna, wherein the combined RF signal comprises a Bluetooth signal and an Orthogonal Frequency Division Multiplexing (OFDM) Wireless Local Area Network (WLAN) signal, wherein the OFDM WLAN signal is encoded with an error correction code, wherein the Bluetooth signal includes Bluetooth data, and wherein the OFDM WLAN signal includes WLAN data; (b) using a wireless interface to amplify the combined RF signal, to down-convert the combined RF signal, to perform filtering, and to perform analog-to-digital conversion thereby obtaining time domain samples; (c) using a processing system to convert the time-domain-samples into a frequency domain signal; (d) using the processing system to decode the frequency domain signal to obtain a decoded frequency domain signal and thereby recovering the WLAN data; (e) using the processing system to subtract the decoded frequency domain signal from the frequency domain signal to obtain a subtractor output signal; and (f) using the processing system to perform inverse fast Fourier transform (IFFT) processing on the subtractor output signal and thereby recovering the Bluetooth data, wherein the antenna, the wireless interface and the processing system are parts of a receiver. - View Dependent Claims (20, 21)
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22. A receiver, comprising:
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a single antenna; a single wireless interface that receives a combined first and second signal from the single antenna, wherein the first signal has first data in a first frequency band, wherein the second signal has second data in a second frequency band wider than the first frequency band, wherein at least a portion of the first frequency band is within the second frequency band for a period of time, wherein the second signal is encoded with an error correction code, and wherein the single wireless interface amplifies the combined first and second signal to generate an amplified combined first and second signal, down-converts the amplified combined first and second signal to generate a down-converted combined first and second signal, and filters the down-converted combined first and second signal to generate filtered combined first and second signal, and analog-to-digital converts the filtered combined first and second signal to generate time-domain samples; and a single processing system that receives the time-domain samples and performs fast Fourier transform (FFT) processing and sub-carrier demapper processing and inverse discrete Fourier transform (IDFT) processing thereby generating a single frequency domain signal, wherein the single processing system then recovers from the single frequency domain signal both the first data and the second data, wherein the single processing system comprises; an FEC (forward error correction) decoder that decodes the single frequency domain signal and outputs a decoded frequency domain signal, wherein the decoded frequency domain signal comprises the second data; a subtractor that receives the decoded frequency domain signal and the frequency domain signal and outputs a subtractor output signal; and an inverse fast Fourier transform (IFFT) functionality that receives the subtractor output signal and outputs the first data.
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Specification