HIGH SPEED COMMUNICATIONS SYSTEM

• US 20160380787A1
• Filed: 06/27/2016
• Published: 12/29/2016
• Est. Priority Date: 06/26/2015
• Status: Active Grant

• Current Assignee: Kandou Labs, SA
• Original Assignee: Kandou Labs, SA
• Inventors: Tajalli, Armin, Hormati, Ali, Shokrollahi, Amin
• Granted Patent: US 9,832,046 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 25/03057 with a recursive structure H04L25/03031 takes precedence
• CPC Class Codes: H04L 25/03885 adaptive
• CPC Class Codes: H04L 25/03898 codebook-based design selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456
• CPC Class Codes: H04L 25/49 using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems spectral shaping H04L25/03828

Abstract

Transmission of baseband and carrier-modulated vector codewords, using a plurality of encoders, each encoder configured to receive information bits and to generate a set of baseband-encoded symbols representing a vector codeword; one or more modulation circuits, each modulation circuit configured to operate on a corresponding set of baseband-encoded symbols, and using a respective unique carrier frequency, to generate a set of carrier-modulated encoded symbols; and, a summation circuit configured to generate a set of wire-specific outputs, each wire-specific output representing a sum of respective symbols of the carrier-modulated encoded symbols and at least one set of baseband-encoded symbols.

Claims

1. An apparatus comprising:

a plurality of encoders, each encoder configured to receive information bits and to generate a set of baseband-encoded symbols representing a vector codeword;

one or more modulation circuits, each modulation circuit configured to operate on a corresponding set of baseband-encoded symbols, and using a respective unique carrier frequency, to generate a set of carrier-modulated encoded symbols; and

,

a summation circuit configured to generate a set of wire-specific outputs, each wire-specific output representing a sum of respective symbols of the carrier-modulated encoded symbols and at least one set of baseband-encoded symbols.

2. The apparatus of claim 1, wherein each encoder of the plurality of encoders comprises a partial response encoder configured to generate partial-response baseband-encoded symbols.

3. The apparatus of claim 2, wherein the partial response encoder is selected from the group consisting of a duobinary partial response encoder, modified duobinary partial response encoder, dicode partial response encoder, Class 2 partial response encoder, and Hamming filter partial response encoder.

4. The apparatus of claim 2, wherein the partial response encoder is configured to generate a symbol-wise weighted summation of a plurality of Ensemble Non-Return-to-Zero (ENRZ) vector codewords.

5. The apparatus of claim 4, wherein the plurality of Ensemble Non-Return-to-Zero (ENRZ) vector codewords comprises a consecutive pair of ENRZ codewords.

6. The apparatus of claim 1, wherein the plurality of encoders comprises a plurality of Ensemble Non-Return-to-Zero (ENRZ) encoders that generate ENRZ vector codewords.

7. The apparatus of claim 6, wherein each ENRZ codeword represents a sum of sub-channel code vectors wherein a weighting of each sub-channel code vector is based on a corresponding antipodal weight determined by a corresponding information bit in the received information bits.

8. The apparatus of claim 1, further comprising a error correction encoder configured to accept at least a portion of the received information bits and produce an output stream having increased redundancy.

9. The apparatus of claim 8, wherein the increased redundancy produced by the error correction encoder comprises at least one repetition of the accepted received information bits.

10. The apparatus of claim 8, wherein the increased redundancy produced by the error correction encoder comprises a forward error correction encoding of the accepted received information bits.

11. The apparatus of claim 10, wherein the forward error correction is a [7,4,3] Hamming code.

12. A method comprising

receiving information bits and responsively generating at least two sets of baseband symbols, each set of baseband symbols representing a corresponding baseband vector codeword;

generating at least one carrier-modulated codeword by modulating at least one set of baseband symbols with at least one carrier; and

,

transmitting in parallel over a plurality of wires a codeword superposition signal comprising at least one baseband codeword and at least one carrier-modulated codeword.

13. The method of claim 12, wherein each wire of the plurality of wires is driven with one baseband symbol from a baseband codeword and a carrier-modulated symbol of a carrier-modulated codeword.

14. The method of claim 12 wherein the transmitted codeword superposition signal comprises a partial-response-coded baseband codeword and a partial-response-coded carrier-modulated codeword.

15. An apparatus comprising:

a plurality of Ensemble Non-Return-to-Zero (ENRZ) mixers, each ENRZ mixer configured to receive a set of wire-specific outputs and responsively generate a respective superposition subchannel representing a superposition of a baseband subchannel and at least one carrier-modulated subchannel, wherein each ENRZ mixer is configured to perform a subchannel-specific mixing operation;

a plurality of filters configured to parse the plurality of superposition subchannels into a corresponding set of baseband subchannel signals and at least one set of carrier-modulated subchannel signals;

at least one balanced mixer circuit configured to convert each of the at least one set of carrier-modulated subchannel signals into a set of demodulated-baseband subchannel signals; and

a plurality of samplers configured to sample the set of baseband subchannel signals and the at least one set of demodulated-baseband signals to produce a set of decoded output bits.

16. The apparatus of claim 15, wherein the subchannel-specific mixing operation is determined according to a set of weights associated with the respective mixer inputs, wherein the weights correspond to a subchannel vector.

17. The apparatus of claim 15, further comprising a majority decoder configured to produce at least a portion of the set of decoded output bits.

18. The apparatus of claim 15, further comprising a forward error correction decoder configured to produce at least a portion of the set of decoded output bits.

19. The apparatus of claim 18, wherein the forward error correction decoder utilizes a [7,4,3] Hamming code.

20. The apparatus of claim 15, further comprising a decision feedback equalizer operating independently on each baseband subchannel signal in the set of baseband subchannel signals and each demodulated-baseband subchannel signal of the at least one set of demodulated-baseband subchannel signals.