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High-order modulation data symbol phase compensation method, device and circuit

A data symbol, phase compensation technology, applied in the field of communication

Active Publication Date: 2016-01-27
SHANGHAI NUFRONT ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the step size of the oscillator frequency control is about 10-12HZ, and the phase error can reach 9 degrees.

Method used

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  • High-order modulation data symbol phase compensation method, device and circuit
  • High-order modulation data symbol phase compensation method, device and circuit
  • High-order modulation data symbol phase compensation method, device and circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0128] Such as image 3 As shown, Embodiment 1 of the present invention provides a method for phase compensation of high-order modulation data symbols, including the following steps:

[0129] Step S11, receiving pilot symbols and data symbols;

[0130] Step S12, estimating through the pilot symbols to obtain a phase error;

[0131] Step S13, using the phase error to perform phase compensation on the data symbols to obtain compensated data symbols;

[0132] Step S14, sending the compensated data symbols.

[0133] Preferably, step S12 specifically includes the following steps:

[0134] Step S121, taking the conjugate of the pilot symbol to obtain the result a;

[0135] This step can specifically be understood as taking the conjugate of the complex signal of the pilot symbol, or taking the conjugate of the complex exponential signal of the pilot symbol, or taking the conjugate of the vector signal of the pilot symbol . Taking the conjugate of the complex signal is equivalen...

Embodiment 2

[0146] Such as Figure 4 As shown, Embodiment 2 of the present invention provides another method for phase compensation of high-order modulation data symbols, including the following steps:

[0147] Step S21, receiving pilot symbols and data symbols;

[0148] Step S22, filtering the pilot symbols to obtain filtered pilot symbols;

[0149] Preferably, the filtering may be one of low-pass filtering, high-pass filtering or band-pass filtering.

[0150] Step S23, estimating through the filtered pilot symbols to obtain the phase error;

[0151] Step S24, using the phase error to perform phase compensation on the data symbols to obtain compensated data symbols;

[0152] Step S25, sending the compensated data symbols.

[0153] Preferably, step S23 specifically includes the following steps:

[0154] Step S231, taking the conjugate of the filtered pilot symbols to obtain the result a;

[0155] Step S232, taking the modulus length or demultiplexing the filtered pilot symbols to ob...

Embodiment 3

[0161] Such as Figure 4 As shown, Embodiment 3 of the present invention provides another method for phase compensation of high-order modulation data symbols, including the following steps:

[0162] Step S21, receiving pilot symbols and data symbols;

[0163] Step S22, filtering the pilot symbols to obtain filtered pilot symbols;

[0164] Preferably, the filtering may be one of low-pass filtering, high-pass filtering or band-pass filtering.

[0165] Step S23, estimating through the filtered pilot symbols to obtain the phase error;

[0166] Step S24, using the phase error to perform phase compensation on the data symbols to obtain compensated data symbols;

[0167] Step S25, sending the compensated data symbols.

[0168] Preferably, step S23 specifically includes the following steps:

[0169] Step S231, taking the modulo length or demultiplexing the pilot symbols to obtain the result c;

[0170] Step S232, dividing the pilot symbol d by the result c to obtain the division...

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Abstract

The invention discloses a high-order modulation data symbol phase compensation method, which comprises the steps of: receiving a pilot symbol and a data symbol; estimating by using the pilot symbol to obtain a phase error; conducting phase compensation on the data symbol by using the phase error to obtain a compensated data symbol; and sending the compensated data symbol. The invention further discloses a high-order modulation data symbol phase compensation device and a high-order modulation data symbol phase compensation circuit. By adopting the technical scheme provided by the invention, the decoding error is reduced through phase compensation, and the performance of an HSPA+ system of the same throughput is greatly improved when a high signal-to-noise ratio scene adopts a 64QAM modulation method.

Description

technical field [0001] The invention belongs to the communication field, and in particular relates to a method, device and circuit for demapping phase compensation of high-order modulated data symbols. Background technique [0002] With the research and development of HSPA+ (High-speed Packet Access Evolution, High-speed Packet Access Evolution, "HSPA+" is used to represent HSPA Evolution) technology in WCDMA (Wireless Code Division Multiple Access, Wireless Code Division Multiple Access) system, in 3GPP (3rdGenerationPartnershipProject, the third 64QAM (Quadrature Amplitude Modulation, Phase Quadrature Amplitude Modulation) technology was introduced in the R7 version. In order to further increase the transmission rate of the wireless communication system, high-order modulation is widely used in the communication system. In the 64QAM constellation diagram, the constellation points are close in space with only a very small angular separation. Such as figure 1 The angular s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/38H04L27/26H04L25/03
Inventor 司宏伟鲍东山肖伟刘飞
Owner SHANGHAI NUFRONT ELECTRONICS TECH