A modulation processing method and transmission device for transmitting data in multi-carrier system

A multi-carrier system and data transmission technology, applied in multi-carrier systems, diversity/multi-antenna systems, transmission control/equalization, etc., can solve the difficulties in cell identification, the inability to reduce PAR in TD-SCDMA multi-carrier systems, and the difficulties in network planning and other issues to achieve the effect of reducing PAR, facilitating network planning and system operation, and reducing PAR value

Inactive Publication Date: 2010-12-22
TD TECH COMM TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve the goal of reducing PAR in theory, according to the existing agreement, there are only 128 training sequence identifiers in the TD-SCDMA multi-carrier system, so the repetition rate of training sequence identifiers is high, giving Cell identification brings difficulties; in addition, since all existing TD-SCDMA protocols are based on the same cell using the same training sequence identifier, the existing PAR reduction method violates the protocol, and will give TD-SCDMA multi-carrier Other operations of the system have a greater impact and bring greater difficulties to network planning
Therefore, existing methods cannot really effectively reduce PAR in actual TD-SCDMA multi-carrier systems

Method used

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  • A modulation processing method and transmission device for transmitting data in multi-carrier system
  • A modulation processing method and transmission device for transmitting data in multi-carrier system
  • A modulation processing method and transmission device for transmitting data in multi-carrier system

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Experimental program
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Effect test

Embodiment 1

[0061] In this embodiment, the TD-SCDMA multi-carrier system is a single-antenna mode. In order to facilitate phase rotation processing, this embodiment presets the phase rotation amount corresponding to each training sequence offset, for example, establishes a correspondence table between the training sequence offset and the phase rotation amount.

[0062] image 3 A flow chart of the method for processing transmission data modulation in this embodiment is shown. see image 3 , the method includes:

[0063] In steps 301-302, channel coding and framing processing are performed on the original data on each carrier to obtain the burst in-phase quadrature (burst IQ) data of each RU; and power control processing is performed on each burst IQ data, for Each RU synthesizes TX burst data.

[0064] In the TD-SCDMA multi-carrier system, RU represents the wireless resources on a code channel, usually each carrier has 16 RUs; the training sequence offset represents the cyclic shift m...

Embodiment 2

[0081] In this embodiment, the TD-SCDMA multi-carrier system is in the smart antenna test mode. The so-called smart antenna test mode refers to the TD-SCDMA multi-carrier system that adopts the smart antenna mode simulated in the laboratory for test purposes. Similar to Embodiment 1, in order to facilitate phase rotation processing in this embodiment, a corresponding phase rotation amount is set in advance for each training sequence offset, for example, a correspondence table between training sequence offset and phase rotation amount is established.

[0082] Figure 7 A flow chart of the method for transmitting data modulation processing in this embodiment is shown. see Figure 7 , the method includes:

[0083] In steps 701 to 703, channel coding and framing processing are performed on the original data on each carrier loaded by analog to obtain the burst IQ data of each RU; power control processing is performed on each burst IQ data to synthesize a TX burst for each RU da...

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Abstract

The invention discloses a modulating processing method for sending data in a multi-carrier system. The method comprises the steps that: A. TX burst data is sent for each radio unit RU, different phase rotation is carried out to the TX burst data corresponding to the RU in a same carrier but belonging to different training sequence offset as well as the TX burst data corresponding to the RU in different carriers but belonging to same training sequence offset; B. all TX burst data corresponding to each carrier and after the phase rotation is superimposed and then variable frequency modulation processing is carried out to the superimposed result. The invention also discloses a sending terminal device used for sending data modulation processing. The device comprises at least one training sequence offset data processing module and a to-be-sent data generation module. The technical proposal of the invention can effectively reduce peak-to-mean ratio in the TDD-synchronous CDMA MC system.

Description

technical field [0001] The invention relates to time division duplex-synchronous code division multiple access (TD-SCDMA) technology, in particular to a modulation processing method and sending end equipment for sending data in a TD-SCDMA multi-carrier system. Background technique [0002] According to the current TD-SCDMA multi-carrier protocol, all carriers in each cell use the same midamble ID, so as to ensure that multiple carriers in the same cell have the same cell ID. Since the training sequence identifiers used on each carrier in the same cell are the same, after these data are superimposed in the time domain, large spikes will appear at certain moments, which can easily cause a large peak-to-average ratio (PAR) , that is, the ratio of the peak power to the average power of the signal is large. For the TD-SCDMA system, on the one hand, because the power amplifier cannot linearly amplify the signal with a large amplitude range, the signal with a large PAR will produc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/32H04B7/005H04B7/04
CPCY02D30/70
Inventor 熊兵
Owner TD TECH COMM TECH LTD
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