Multi-carrier reception for ultra-wideband (UWB) systems
First Claim
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1. A method comprising:
- receiving a symbol, wherein the symbol is first spread with a spreading code used to spread all symbols to be transmitted and then modulated;
stripping redundancy from the symbol;
despreading the symbol; and
demodulating the symbol.
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Abstract
System and method for receiving transmissions in a wireless communications system. A preferred embodiment comprises a receiver (such as receiver 400) that can despread and then demodulate a symbol from a transmitter that first spread and then modulated the symbol. By reversing the processing order, the demodulation can be performed at a lower data rate and therefore reducing computational and power requirements.
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Citations
26 Claims
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1. A method comprising:
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receiving a symbol, wherein the symbol is first spread with a spreading code used to spread all symbols to be transmitted and then modulated;
stripping redundancy from the symbol;
despreading the symbol; and
demodulating the symbol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A receiver comprising:
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an analog section coupled to a signal input, the analog section containing circuitry to filter and amplify a signal received at the signal input;
an analog-to-digital converter (ADC) coupled to the analog section, the ADC to convert an output of the analog section into a digital symbol stream;
a digital section coupled to the ADC, the digital section comprising a redundancy elimination circuit (REC) coupled to the ADC, the REC containing circuitry to removed redundancies inserted into a digital symbol;
a despreader coupled to the REC, the despreader containing circuitry to apply a spreading code to a digital symbol, one digital symbol at a time; and
a demodulator coupled to the despreader, the demodulator containing circuitry to remove modulation applied to the digital symbol. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification