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Channel estimation and frequency domain equalization method and device and general-purpose processor

A technology of channel estimation and frequency domain equalization, applied in multi-frequency code system, shaping network in transmitter/receiver, baseband system components, etc., can solve the problem of increasing signal processing delay and affecting the real-time performance of signal receiving end, etc. question

Inactive Publication Date: 2014-07-09
CHINA MOBILE COMM GRP CO LTD
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Problems solved by technology

[0005] The existing algorithms for channel estimation and frequency domain equalization are processed step by step in a serial manner during the implementation process, which greatly increases the signal processing delay and affects the real-time performance of the signal receiving end.

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  • Channel estimation and frequency domain equalization method and device and general-purpose processor
  • Channel estimation and frequency domain equalization method and device and general-purpose processor
  • Channel estimation and frequency domain equalization method and device and general-purpose processor

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Embodiment Construction

[0047] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail by citing the following embodiments and referring to the accompanying drawings.

[0048] Step 1: For the pilot symbols in the received OFDM symbols, use the local pilot symbols and use the LS method to calculate the channel response estimation of the pilot symbols in the OFDM symbols (ie, the pilot positions in the OFDM symbols).

[0049] When using the LS estimation method, the pilot symbols and local pilot symbols in the received OFDM symbols are respectively stored in a continuous memory, and the processing bit width of the processing platform is used as the unit, and the SIMD instructions are used to respectively store the received OFDM symbols The pilot symbol is divided by the local pilot symbol. Since the modulus value of the pilot symbol is 1, in actual calculation, the received symbol is multiplied by the loca...

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Abstract

The invention discloses a channel estimation and frequency domain equalization method. The method comprises the steps that multiple pilot symbols of received OFDM symbols are utilized to carry out channel estimation by using SIMD instructions, and the SIMD instructions are utilized to calculate channel estimated values of non-pilot symbol positions of the OFDM symbols respectively according to the channel estimation values of multiple pilot symbol positions of the OFDM symbols. The invention discloses a channel estimation and frequency domain equalization device. According to the technical scheme, the OFDM signals are processed based on a general-purpose multi-core processor, parallel optimization is carried out on related algorithms based on an SIMD instruction collection, calculation time delay is made to be reduced to be inversely proportional to parallel times, processing time delay is reduced greatly, and the instantaneity requirement of signal processing at a receiving end is met.

Description

technical field [0001] The present invention relates to channel estimation and frequency domain equalization technology, in particular to a channel estimation and frequency domain equalization method and device based on Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) symbols. Background technique [0002] In future mobile communication systems, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) technology is considered to be a key technology for realizing high-speed data transmission. In order to achieve higher data transmission efficiency, OFDM must be combined with high-order modulation, such as 16QAM, 64QAM and so on. In order to be able to carry out coherent demodulation at the receiving end, relevant information of the channel is needed, so channel estimation and channel compensation have become important components of OFDM systems. Usually, the channel estimation also includes the...

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Application Information

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IPC IPC(8): H04L27/26H04L25/02H04L25/03
Inventor 卢臻李洲段然贺志强陈奎林
Owner CHINA MOBILE COMM GRP CO LTD
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