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Space frequency group code detection method and apparatus

A detection method, space-frequency grouping technology, applied in the direction of preventing/detecting errors and signal channels through diversity reception, can solve problems such as error floor, and achieve the effect of improving system performance and low complexity

Active Publication Date: 2009-02-04
HUAWEI TECH CO LTD +1
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Problems solved by technology

[0028] The embodiment of the present invention provides a space-frequency block code detection method and device to solve the problem of serious error floor when the space-frequency block code is used for detection in the prior art

Method used

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  • Space frequency group code detection method and apparatus
  • Space frequency group code detection method and apparatus
  • Space frequency group code detection method and apparatus

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Embodiment Construction

[0054] A detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0055] image 3 is a schematic flow chart of a space-frequency block code detection method according to an embodiment of the present invention, as shown in image 3 shown, including the following steps:

[0056] Step 301, Gaussian approximation is performed on the interference distribution of the received signal variables to obtain probability information of each transmitted symbol, the probability information including initial probability, mean value and variance.

[0057] For the receiving vector r in formula (6) k Perform the following processing, multiply both sides of (6) by H k H have to

[0058] y k = H k H r k = c k ...

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Abstract

The invention discloses a method for testing space-frequency block codes, which comprises: calculation in caussian approximation is performed to the interference distribution of received signal variable to obtain the initial probability, the typical values and the variances of sent symbols; the initial probability of the send symbols is updated, and the probability of the sent symbols is obtained; the maximum likehood ratio of the sent symbols is obtained according to the probability of the sent symbols; and the sent symbols is tested according to the maximum likehood ratio of the sent symbols. The invention also provides a space-frequency block code testing device to reduce the error floor in ultra-wideband channel, so that the system performance is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method and device for detecting a space-frequency block code. Background technique [0002] At present, in broadband wireless communication, in most cases, the phenomenon of multipath delay extension exists in the channel. In a multipath MIMO (Multiple Input Multiple Output, Multiple Input Multiple Output) channel, due to the influence of ISI (Intersymbol Interference, Intersymbol Interference), the multipath MIMO channel technology is difficult to apply. In the prior art, to combat ISI in the time domain, space-time coding is adopted at the sending end, or space-time equalization is adopted at the receiving end, but the technical complexity of the time domain is relatively high. OFDM (Orthogonal Frequency Division Multiplexing, Orthogonal Frequency Division Multiplexing) is an effective technology developed in single-antenna systems to combat ISI. Applying OFDM...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04L5/02
Inventor 肖海勇毕光国朱学生李云岗
Owner HUAWEI TECH CO LTD
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