Efficient multi-band communication system

Patent metadata

Field	Value
Publication number	US-9590830-B2
Application number	US-86792409-A
Country	US
Kind code	B2
Filing date	Mar 9, 2009
Priority date	Mar 10, 2008
Publication date	Mar 7, 2017
Grant date	Mar 7, 2017

Abstract

A multi-band communication system ( 400 ). The system includes a plurality of transmit channels ( 420 - 1, 420 -N), wherein each transmit channel ( 420 -X) transmits data streams through a single sub-band; and a plurality of receive channels ( 460 - 1, 460 -N), wherein each receive channel ( 460 -X) receives data streams of a single sub-band. In an embodiment of the invention, each transmit channel ( 420 -X) and its respective receive channel ( 460 -X) are configured with a different set of channel codes to encode and decode the data. The set of channel codes is determine by an adaptive modulation coding (AMC) controller ( 461 -X) based on the condition of the link between a transmit channel ( 420 -X) and a receive channel ( 460 -X).

First claim

What we claim is:

1. A transmitter operable in an Ultra-wideband (UWB) multi-band communication system, comprising:
a plurality of transmit channels to generate modulation symbols and transmit the modulation symbols in parallel through a single sub-band of a plurality of sub-bands, wherein the plurality of transmit channels comprise at least: a plurality of channel encoders for encoding in parallel information bits, split into streams, to be transmitted as the symbols through the single sub-band out of the plurality of sub-bands, wherein each sub-band is set with at least a different channel code, wherein each of the plurality of channel encoders is configured to encode the information bits according to a channel code set for a respective transmit channel, wherein each sub-band of the plurality of sub-bands is a UWB sub-channel; and
a multiplexer (MUX) to multiplex the modulation symbols generated for the single sub-band by the plurality of transmit channels into a single stream using a time frequency code (TFC).

2. The transmitter of claim 1 , wherein the modulation symbols comprise orthogonal frequency-division multiplexing (OFDM) symbols.

3. The transmitter of claim 1 , wherein each of the plurality of channel encoders of a transmit channel is set with the different channel code by an adaptive modulation coding (AMC) controller.

4. The transmitter of claim 3 , wherein the channel codes are determined based on a condition of a link between the transmit channel and a respective receive channel.

5. A method for performing a parallel encoding in an Ultra-wideband (UWB) multi-band communication system, comprising:
splitting input information bits into a plurality of streams, wherein each stream belongs to a single sub-band out of a plurality of sub-bands, wherein each sub-band of the plurality of sub-bands is set with a different channel code and a different symbol constellation, wherein each sub-band of the plurality of sub-bands is a UWB sub-channel;
encoding the plurality of streams in parallel using at least one channel code set for the single sub-band;
generating orthogonal frequency-division multiplexing (OFDM) symbols from each encoded stream using a symbol constellation set for the single sub-band;
multiplexing the OFDM symbols generated for the plurality of streams into a single data stream; and
transmitting the single data stream, wherein the OFDM symbols of the single sub-band are transmitted in the same data.

6. The method of claim 5 , further comprising:
receiving the data stream;
demultiplexing the data stream into a plurality of receive channels in parallel, wherein each receive channel receives the OFDM symbols of the single sub-band;
processing, by each receive channel, the OFDM symbols to generate a stream;
decoding the stream using the at least one channel code set for the single sub-band; and
evaluating the decoding results to determine if a new set of channel codes is needed.

7. A non-transitory computer-readable medium having stored therein computer executable code which upon execution instructs at least one processor to:
split input information bits into a plurality of streams, wherein each stream belongs to a single sub-band out of a plurality of sub-bands, wherein each sub-band of the plurality of sub-bands is set with a different channel code and a different symbol constellation, wherein each sub-band of the plurality of sub-bands is a UWB sub-channel;
encode the plurality of streams in parallel using at least one channel code set for the single sub-band;
generate orthogonal frequency-division multiplexing (OFDM) symbols from each encoded stream using a symbol constellation set for the single sub-band;
multiplex the OFDM symbols generated for the plurality of streams into a single data stream; and
transmit the single data stream, wherein the OFDM symbols of the single sub-band are transmitted in the same data stream.

8. The non-transitory computer-readable medium of claim 7 , wherein the computer executable code further instructs the at least one processor to:
receive the data stream;
demultiplex the data stream into a plurality of receive channels in parallel, wherein each receive channel receives the OFDM symbols of the single sub-band;
process, by each receive channel, the OFDM symbols to generate a stream;
decode the stream using at least the channel code set for the single sub-band; and
evaluate the decoding results to determine if a new set of channel codes is needed.

Assignees

• Wang Dong
• Yang Jun
• Birru Dagnachew
• Koninklijke Philips Nv

Inventors

• Wang Dong
• Yang Jun
• Birru Dagnachew

Classifications

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04L27/2601 Primary

  Multicarrier modulation systems · CPC title

• H04L1/0003 Primary

  by switching between different modulation schemes · CPC title

• H04L5/0007

  the frequencies being orthogonal, e.g. OFDM(A) or DMT · CPC title

• H04B1/7163

  using impulse radio · CPC title