System and method for OFDM symbol interleaving

Patent metadata

Field	Value
Publication number	US-10116404-B2
Application number	US-201715796857-A
Country	US
Kind code	B2
Filing date	Oct 30, 2017
Priority date	Jul 3, 2014
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

An orthogonal frequency division multiplexing (OFDM) transmitter that includes an encoder, an interleaver, a symbol processor; and a transmission module; wherein the encoder is configured to encode a superframe to provide an encoded superframe; wherein the encoded superframe comprises a sequence of encoded frames; wherein the interleaver is configured to allocate multiple frequency sub-bands to each encoded frame of the encoded superframe by assigning adjacent frequency sub-bands to successive symbols of each encoded frame; wherein the symbol processor is configured to generate, for each encoded frame and according to the assignment of the multiple frequency sub-bands, an intermediate set of symbols; and wherein the transmission module is configured to transmit simultaneously, for each encoded frame, OFDM symbols that represents the intermediate set of symbols.

First claim

We claim:

1. An orthogonal frequency division multiplexing (OFDM) receiver, comprising: a decoder, a de-interleaver, a symbol processor, and a reception module; wherein the reception module is constructed and arranged to receive OFDM symbols representative of an encoded superframe that comprises multiple encoded frames; wherein the symbol processor is constructed and arranged to generate, in response to OFDM symbols associated with each encoded frame, all received symbols that are associated with the encoded frame; wherein adjacent symbols of each encoded frame are represented by OFDM symbols that belong to adjacent sub-bands; wherein the de-interleaver is constructed and arranged to de-interleave all received symbols that are associated with each encoded frame to provide the encoded superframe; and wherein the decoder is constructed and arranged to decode the encoded superframe to provide a decoded superframe.

2. The OFDM receiver according to claim 1 wherein the reception module comprises an optical to electrical converter, an analog to digital converter, synchronizer and cyclic prefix drop and serial to parallel converter, a Fast Fourier Transform converter, a single tap equalizer, multiple Inverse Fast Fourier Transform unit converters, multiple Multi-symbol Differential Detection modules and a parallel to serial converter.

3. A method for receiving orthogonal frequency division multiplexing (OFDM) signals, comprising receiving OFDM symbols representative of an encoded superframe that may include multiple encoded frames; generating, in response to OFDM symbols associated with each encoded frame, all received symbols that are associated with the encoded frame; wherein adjacent symbols of each encoded frame are represented by OFDM symbols that belong to adjacent sub-bands; de-interleaving all received symbols that are associated with each encoded frame to provide the encoded superframe; and decoding the encoded superframe to provide a decoded superframe.

Assignees

• Technion Res & Development Ltd
• Technion Res & Development Found Ltd

Inventors

• Nazarathy Moshe
• Bar Amitay
• Shalom Aviv
• Tselniker Igor

Classifications

• H04L27/2636

  with FFT or DFT modulators, e.g. standard single-carrier frequency-division multiple access [SC-FDMA] transmitter or DFT spread orthogonal frequency division multiplexing [DFT-SOFDM] · CPC title

• H04L5/003

  Arrangements for allocating sub-channels of the transmission path · CPC title

• H04L1/0071

  Use of interleaving (interleaving per se H03M13/27) · CPC title

• H04J11/0023 Primary

  Interference mitigation or co-ordination (direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541) · CPC title

• H04L7/0016

  correction of synchronization errors · CPC title