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Symbol-level combining for MIMO systems with HARQ and/or repetition coding

A signal and signal vector technology, applied in the field of symbol-level combination of MIMO systems using HARQ and/or repetition coding, can solve problems such as insufficient error correction capabilities

Inactive Publication Date: 2009-09-09
MARVELL INT LTD
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Problems solved by technology

Therefore, the low-redundancy code used for the first transmission of the packet has high code rate or throughput, but is not capable enough in terms of error correction

Method used

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  • Symbol-level combining for MIMO systems with HARQ and/or repetition coding
  • Symbol-level combining for MIMO systems with HARQ and/or repetition coding
  • Symbol-level combining for MIMO systems with HARQ and/or repetition coding

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Embodiment Construction

[0045] The disclosed invention provides a technique in a multiple-input multiple-output data transmission or storage system for decoding signal vectors at a receiver, where the receiver may receive multiple signal vectors from the same transmitted signal vector.

[0046] figure 1 A diagram of a basic data transmission or storage system according to one embodiment of the invention is shown. Data, generally divided into packets, is sent from the transmitter 102 to the receiver 112 . During transmission, the signal may be altered by the transmission medium represented by channel 106 and by additional noise sources 108 . Transmitter 102 has N t outputs 104, and the receiver 112 has N r inputs 110, so the channel 106 is modeled as having N t inputs and N r output multiple-input multiple-output (MIMO) system. N t inputs and N r The dimensionality of each output can be achieved using multiple time, frequency or space dimensions or any combination of these dimensions.

[004...

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Abstract

The present invention provides systems and methods for decoding signal vectors in multiple-input multiple-output (MIMO) systems, where the receiver has received one or more signal vectors from the same transmitted vector. The symbols of the received signal vectors are combine, forming a combined received signal vector that may be treated as a single received signal vector. The combined signal vector is then decoded using a maximum- likelihood decoder. In some embodiments, the combined received signal vector may be processed prior to decoding. Systems and methods are also provided for computing soft information from a combined signal vector based on a decoding metric. Computationally intensive calculations can be extracted from the critical path and implemented in preprocessors and / or postprocessors. One embodiment considers the MIMO HARQ reception using Cholesky decomposition or factoruzation of the metric.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit under 35 U.S.C. § 119(e) of the following U.S. provisional applications: No. 60 / 820,419 filed July 26, 2006, No. 60 / 822,294 filed Aug. No. 60 / 822,821, filed August 18, the entire contents of these applications are hereby incorporated by reference. technical field [0003] The present invention relates to a technique for decoding a received signal vector in a multiple-input multiple-output (MIMO) data transmission or storage system where multiple instances of the same transmitted signal vector may be received by a receiver (instance). Background technique [0004] In data transmission or storage systems, it is desirable to receive exactly at the destination information, often divided into packets. A transmitter located at or near the source transmits the information provided by the source via a signal or signal vector. A receiver located at or near the destination processes the si...

Claims

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Application Information

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IPC IPC(8): H04L1/18H04B7/08H04L25/06
CPCH04B7/0848H04L1/1819H04L25/067H04L1/1816H04L1/1845H04B7/0413
Inventor 李贞元张锭雄宋蕾蕾
Owner MARVELL INT LTD
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