METHOD AND DEVICE FOR TRANSFERRING DATA IN A MULTI-CARRIER SYSTEM HAVING PARALLEL CONCATENATED ENCODING AND MODULATION

• US 20090067526A1
• Filed: 08/30/2008
• Published: 03/12/2009
• Est. Priority Date: 05/08/2001
• Status: Active Grant

• Current Assignee: Callahan Cellular LLC (Intellectual Ventures LLC)
• Original Assignee: Prasendt Investments LLC (Intellectual Ventures LLC)
• Inventors: Ratermann, Albert, Schanzmann, Martin
• Granted Patent: US 8,179,987 B2
• Time in Patent Office: Days
• US Class Current: 375/261
• CPC Class Codes: H04L 1/005 Iterative decoding, including iteration between signal detection and decoding operation
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0068 by puncturing
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/2602 Signal structure
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The invention relates to a transmitter-receiver pair for improved data transmission in a multi-carrier system and to a corresponding method, according to which a chain coding is used. To this end, a transmitter has a first coding stage, a transmission-demultiplexer stage, a second coding stage, a modulator stage, a transmission multiplexer stage and a multi-carrier modulator, whereby said transmission-demultiplexer stage and the transmission multiplexer stage are controlled by a bit loading device. Similarly, the receiver has a multi-carrier demodulator, a receiver demultiplexer stage, a first decoding stage, a receiver multiplexer stage and a second decoding stage, whereby the receiver multiplexer stage and demultiplexer stage are in turn controlled by the bit loading device.

Claims

1. A transmit device for data transfer in a multi-carrier system, comprising:

a first encoding level for performing a first encoding on a serial data stream;

a transmit demultiplexer level for dividing the encoded serial data stream into a plurality of parallel data streams;

a second encoding level for performing a second encoding for the plurality of parallel data streams, resulting in a plurality of encoded parallel data streams;

a modulator level for performing a QAM modulation for the plurality of encoded parallel data streams, resulting in a plurality of modulated parallel data streams;

a transmit multiplexer level for rearranging the modulated parallel data streams into a serial data stream;

a multi-carrier modulator for performing a pulse shaping and a copying of QAM symbols onto a multi-carrier time signal; and

a bit-load device for performing a bit-load algorithm and for controlling both the transmit demultiplexer level and the transmit multiplexer level;

wherein the second encoding level has a first plurality of encoders, the modulator level has a second plurality of TCM modulators for performing a plurality of different modulation procedures, and the first encoding level has a puncturer for performing a data speed adaptation of the encoded serial data stream depending on the bit-load algorithm performed.