초록 ▼

An IS-OFDM system for point-to-point wireless communications that suppresses narrow-band interference comprises an IS-OFDM transmitter and an IS-OFDM receiver, wherein a transmitted signal comprises a plurality of subcarriers, and further wherein each subcarrier contains more than one and potentiall

An IS-OFDM system for point-to-point wireless communications that suppresses narrow-band interference comprises an IS-OFDM transmitter and an IS-OFDM receiver, wherein a transmitted signal comprises a plurality of subcarriers, and further wherein each subcarrier contains more than one and potentially all symbols transmitted in a given frame. The IS-OFDM transmitted signal is at a data rate that is equal to the data rate of the input data stream via the use of P/S converters.

대표청구항 ▼

1. An interference suppression orthogonal frequency division multiplexed system, comprising: an interference suppression orthogonal frequency division multiplexed receiver, wherein the interference suppression orthogonal frequency division multiplexed receiver comprises: a serial-to-parallel convert

1. An interference suppression orthogonal frequency division multiplexed system, comprising: an interference suppression orthogonal frequency division multiplexed receiver, wherein the interference suppression orthogonal frequency division multiplexed receiver comprises: a serial-to-parallel converter for processing a received signal to produce a plurality of parallel data streams;a transform module for applying a transform function to the plurality of parallel data streams to produce a plurality of parallel complex data streams;a decoder mapper module for applying a demapping function to the plurality of parallel complex data streams to produce a plurality of parallel demapped data streams;a first parallel-to-serial converter for processing the plurality of parallel demapped data streams to produce a serial data stream;a plurality of despreaders, each despreader of the plurality of despreaders coupled to the parallel-to-serial converter, each despreader of the plurality of despreaders operates by applying a code sequence to the serial data stream resulting in a set of parallel despread data streams;a plurality of accumulators for summing the set of parallel despread data streams to produce a plurality of accumulated data streams; anda second parallel-to-serial converter for processing the plurality of accumulated data streams to produce a recovered data stream, wherein each one of the set of parallel despread data streams comprises a plurality of sub-carriers, wherein each one of the plurality of sub-carriers contains data bits of the recovered data stream separated from each other by the code sequence where a power of each one of the data bits is spread to all of the plurality of sub-carriers. 2. The interference suppression orthogonal frequency division multiplexed system of claim 1, wherein the code sequence comprises an orthogonal binary code sequence. 3. The interference suppression orthogonal frequency division multiplexed system of claim 1, wherein the code sequence comprises a hadamard code sequence. 4. The interference suppression orthogonal frequency division multiplexed system of claim 1, wherein the transform function comprises a fourier transform function. 5. The interference suppression orthogonal frequency division multiplexed system of claim 1, wherein the transform function comprises a fast fourier transform function. 6. The interference suppression orthogonal frequency division multiplexed system of claim 1, further comprising: an analog to digital converter for applying a conversion to a demodulated signal to produce the received signal. 7. An interference suppression orthogonal frequency division multiplexed receiver, comprising: a serial-to-parallel converter for processing a received signal to produce a plurality of parallel data streams;a transform module for applying a transform function to the plurality of parallel data streams to produce a plurality of parallel complex data streams;a decoder mapper module for applying a demapping function to the plurality of parallel complex data streams to produce a plurality of parallel demapped data streams;a first parallel-to-serial converter for processing the plurality of parallel demapped data streams to produce a serial data stream;a plurality of despreaders, each despreader of the plurality of despreaders coupled to the parallel-to-serial converter, each despreader of the plurality of despreaders operates by applying a code sequence to the serial data stream resulting in a set of parallel despread data streams;a plurality of accumulators for summing the set of parallel despread data streams to produce a plurality of accumulated data streams; anda second parallel-to-serial converter for processing the plurality of accumulated data streams to produce a recovered data stream, wherein each one of the set of parallel despread data streams comprises a plurality of sub-carriers, wherein each one of the plurality of sub-carriers contains data bits of the recovered data stream separated from each other by the code sequence where a power of each one of the data bits is spread to all of the plurality of sub-carriers. 8. The interference suppression orthogonal frequency division multiplexed receiver of claim 7, wherein the code sequence comprises an orthogonal binary code sequence. 9. The interference suppression orthogonal frequency division multiplexed receiver of claim 7, wherein the code sequence comprises a hadamard code sequence. 10. The interference suppression orthogonal frequency division multiplexed receiver of claim 7, wherein the transform function comprises a fourier transform function. 11. The interference suppression orthogonal frequency division multiplexed receiver of claim 7, wherein the transform function comprises a fast fourier transform function. 12. The interference suppression orthogonal frequency division multiplexed receiver of claim 7, further comprising: an analog to digital converter for applying a conversion to a demodulated signal to produce the received signal. 13. A method for producing a recovered data stream, the method comprising: processing, by a receiver, a received signal to produce a plurality of parallel data streams;applying, by the receiver, a transform function to the plurality of parallel data streams to produce a plurality of parallel complex data streams;applying, by the receiver, a demapping function to the plurality of parallel complex data streams to produce a plurality of parallel demapped data streams;processing, by the receiver, the plurality of parallel demapped data streams to produce a serial data stream;applying, by the receiver, a code sequence to the serial data stream resulting in a set of parallel despread data streams;summing, by the receiver, the set of parallel despread data streams to produce a plurality of accumulated data streams; andprocessing, by the receiver, the plurality of accumulated data streams to produce the recovered data stream, wherein each one of the set of parallel despread data streams comprises a plurality of sub-carriers, wherein each one of the plurality of sub-carriers contains data bits of the recovered data stream separated from each other by the code sequence where a power of each one of the data bits is spread to all of the plurality of sub-carriers. 14. The method of claim 13, wherein the code sequence comprises an orthogonal binary code sequence. 15. The method of claim 13, wherein the code sequence comprises a hadamard code sequence. 16. The method of claim 13, wherein the transform function comprises a fourier transform function. 17. The method of claim 13, wherein the transform function comprises a fast fourier transform function.