SPREAD SPECTRUM WITH DOPPLER OPTIMIZATION
First Claim
1. A method of compensating for induced doppler phase errors while communicating through a multiple access spread spectrum communication interface, the method comprising:
- receiving a first signal at a receiver, wherein the first signal is spread using a predetermined pseudo-noise (PN) code;
dividing the first signal into a plurality of first smaller coherent units; and
analyzing the plurality of first smaller coherent units to configure a demodulation.
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Accused Products
Abstract
A method of compensating for doppler phase errors includes receiving a signal at a receiver wherein the signal is spread using a pseudo-noise code, dividing the signal into a plurality of smaller coherent units and then compensating for induced doppler phase errors by analyzing the plurality of smaller coherent units. Analysis may include producing a plurality of coherent sums by summing across the smaller coherent units and then summing non-coherently the plurality of coherent sums. Analysis may also include demodulating a symbol from the smaller coherent units. A modulation technique may be selected from a plurality of modulation techniques and then be used to encode and transmit a symbol stream.
125 Citations
20 Claims
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1. A method of compensating for induced doppler phase errors while communicating through a multiple access spread spectrum communication interface, the method comprising:
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receiving a first signal at a receiver, wherein the first signal is spread using a predetermined pseudo-noise (PN) code; dividing the first signal into a plurality of first smaller coherent units; and analyzing the plurality of first smaller coherent units to configure a demodulation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A device for communicating in a spread spectrum system comprising:
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a receiver in communication with a processor and configured to receive a first signal, wherein the first signal is spread using a predetermined pseudo-noise (PN) code; and a processor operatively coupled to the receiver and configured to; divide the first signal into a plurality of first smaller coherent units, and analyze the plurality of first smaller coherent units to configure a demodulation. - View Dependent Claims (14, 15, 16)
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17. A spread spectrum communication system comprising:
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a device having a receiver configured to receive a first signal, wherein the first signal is spread using a predetermined pseudo-noise (PN) code and a processor operatively coupled to the receiver and configured to; divide the first signal into a plurality of first smaller coherent units; analyze the plurality of first smaller coherent units to configure a demodulation; and an access point in communication with the device, wherein the access point comprises a transmitter configured to transmit the first signal. - View Dependent Claims (18, 19, 20)
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Specification