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Method and apparatus for detecting data in wireless communication networks via a reduced complexity tree search

A digital communication and communication signal technology, applied in wireless communication, shaping network in transmitter/receiver, telephone communication, etc., can solve the problem of excessive complexity

Inactive Publication Date: 2017-08-01
HUAWEI TECH CO LTD
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  • Claims
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Problems solved by technology

However, to achieve performance close to MLD, the complexity is still too high to implement in many UE designs

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  • Method and apparatus for detecting data in wireless communication networks via a reduced complexity tree search
  • Method and apparatus for detecting data in wireless communication networks via a reduced complexity tree search
  • Method and apparatus for detecting data in wireless communication networks via a reduced complexity tree search

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Embodiment Construction

[0034] In wireless receivers such as those used in UEs acting as mobile devices, it is desirable to use detectors with lower or reduced complexity to provide accurate symbol detection in lower cost UEs. This object can be achieved by using techniques employing an apparatus according to an embodiment of the invention for receiving a digital communication signal comprising a plurality of layers. A channel matrix is ​​estimated based on the digital communication signal, and a first estimated transmitted symbol vector and a mean square error matrix are determined based on a linear analysis of the received digital communication signal. Determining a first set of bit-log-likelihood ratios using a linear minimum mean square error type detector based on the first estimated symbol vector and mean square error matrix, and based on the first estimated symbol vector and mean square error matrix, A second set of bit-log-likelihood ratios is determined by performing a tree search for one or...

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Abstract

An apparatus including a processor configured to receive a digital communication signal having a plurality of transmitted layers. The processor is configured to determine an estimated channel matrix based on the digital communication signal, determine a first estimated transmitted symbol vector and a mean square error matrix based on a linear analysis of the received digital communication signal. A first set of bit LLR are determined based on a LMMSE type detector and a second set of bit LLR are determined based on a novel simplified tree search process. The two sets of bit LLR are then combined and used to detect the data in the received communication signal. The simplified tree search process uses a specially formed channel shortening process to determine a set of shortened channel correlation matrices that allow the second set of bit LLR to be determined using an alternative marginalized tree search process.

Description

technical field [0001] Aspects of the invention relate generally to wireless communication systems and, in particular, to data detection in wireless communication links. Background technique [0002] The prevalence of modern wireless communication devices such as cellular phones, smart phones, and tablet devices is accompanied by a rising demand for high-capacity multimedia data capacity of a large number of user equipment (UE) or mobile stations. These multimedia data capacities can be used to provide services at the UE, such as streaming radio, online games, music and TV. In order to support this increasing demand for higher data rates, based on a variety of transmission technologies, such as time division multiple access (time division multiple access, TDMA), code division multiple access (code division multiple access, CDMA), frequency division multiple access (frequency division multiple access, FDMA), orthogonal frequency division multiple access (orthogonal frequency...

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Application Information

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IPC IPC(8): H04L25/03H04M1/724
CPCH04L25/03203H04L25/03968H04W76/25H04M1/724H04B17/336H04L1/0042H04L27/3461
Inventor 弗雷德里克·鲁塞克胡沙
Owner HUAWEI TECH CO LTD
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