Correction method for phase noise of multi-antenna OFDM system receiving terminal

An orthogonal frequency division and phase noise technology, which is applied in the field of wireless data transmission and can solve problems such as large phase noise and affecting system performance.

Inactive Publication Date: 2011-06-15
TSINGHUA UNIV
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Problems solved by technology

In addition, higher system bandwidth requires higher center frequencies, and higher RF frequencies introduce greater phase noise, further affecting system performance

Method used

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  • Correction method for phase noise of multi-antenna OFDM system receiving terminal
  • Correction method for phase noise of multi-antenna OFDM system receiving terminal
  • Correction method for phase noise of multi-antenna OFDM system receiving terminal

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Embodiment Construction

[0058] The phase noise correction method at the receiving end of the multi-antenna orthogonal frequency division multiplexing system proposed by the present invention has a flowchart as figure 1 As shown, including the following steps:

[0059] (1) At the transmitting end of the multi-antenna orthogonal frequency division multiplexing system, in the process of sending data, a pilot orthogonal frequency division multiplexing symbol is placed in the data orthogonal frequency division multiplexing symbol at a set interval, and the data is positive. The sub-carriers with non-zero data in the cross-frequency division multiplexing symbols and pilot orthogonal frequency division multiplexing symbols are valid sub-carriers;

[0060] (2) For the mth antenna of the transmitting end, select n effective subcarriers among the N effective subcarriers of each pilot orthogonal frequency division multiplexing symbol to place the pilot, and place the effective subcarrier mark after the pilot. Is p 1...

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Abstract

The invention relates to a correction method of phase noise at a multi-antennae Orthogonal Frequency Division Multiplexing (OFDM) system receiving end belonging to the wireless data-transmission field. The method places a pilot OFDM symbol every a plurality of data OFDM symbols. In the pilot symbols, the receiving end obtains a channel matrix of the current symbol as a reference channel matrix ofsubsequent data symbols according to a receiving signal on a pilot sub-carrier and the receiving end pilot. In the data symbols, the receiving end obtains the channel matrix of the current symbol according to the receiving signal on the pilot sub-carrier and a reservation signal at the receiving end and obtains a united matrix of a transceiving phase noise mean values by comparing the channel matrix with that of the pilot symbol. According to an estimate value of the transceiving phase noise mean values which are separated from the united matrix, a detection matrix is adjusted. The method cansimultaneous estimate and correct the phase noise of the transmitting and receiving antennas, and improve the system performance.

Description

Technical field [0001] The invention relates to a method for correcting phase noise at the receiving end of a multi-antenna orthogonal frequency division multiplexing system, which belongs to the field of wireless data transmission. Background technique [0002] The next generation of wireless communications is required to support higher data rates and spectrum efficiency. The use of multi-antenna technology (hereinafter referred to as MIMO) and modulation methods with high spectrum utilization, such as orthogonal frequency division multiplexing (hereinafter referred to as OFDM), is an effective method to obtain high-speed transmission rates. In the MIMO-OFDM system, the phase noise of the transmitting antenna and the receiving antenna will not only cause the common phase deflection of all sub-carriers in an OFDM symbol, but also cause each sub-carrier to be subject to the inter-sub-carrier crosstalk of other sub-carriers. Especially in today's situation where the demand for dat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L27/38
Inventor 周世东张秀军许鹏肖元章王京肖立民周春晖李云洲杨海斌
Owner TSINGHUA UNIV
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