Overlapping multiplexing transmission method, base station and user terminal

A technology of a user terminal and a transmission method, applied in the field of overlapping multiplexing transmission between base stations and user terminals, can solve the problems of unreliable data transmission, difficulty in ensuring the reliability and validity of data transmission, and achieve the effect of optimal transmission efficiency

Active Publication Date: 2009-05-13
CHINA MOBILE COMM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the above analysis, for the OVxDM transmission system, if a fixed number of overlaps and a constraint length of overlapping codes are used, the performance of service data transmission varies greatly with the distance between the user terminal and the base station. When t

Method used

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  • Overlapping multiplexing transmission method, base station and user terminal
  • Overlapping multiplexing transmission method, base station and user terminal
  • Overlapping multiplexing transmission method, base station and user terminal

Examples

Experimental program
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Effect test

Embodiment 1

[0049] Embodiment 1: OVxDM coded transmission is performed once on the modulation symbols.

[0050] see Figure 4 , is a flow chart of specific implementation steps in Embodiment 1 of the present invention, including:

[0051] Step S101 , designing several combinations (L, K) of overlapping coding constraint length L and overlapping times K. Preferably, the link performance of overlapping codes corresponding to various designed combinations can change evenly with the change of SNR.

[0052] In this step S101, the value of the overlapping encoding constraint length L is generally a positive integer not greater than 10, and the value of the number of overlapping K is generally a positive integer not greater than 5. In this way, there are many combinations of L and K, and among all possible combinations of L and K, several combinations of L and K need to be determined as preset combinations of L and K. In order to make the designed combinations of several L and K meet the need...

Embodiment 2

[0093] Embodiment 2: The second iterative OVxDM coded transmission is performed on the modulation symbols, or more than two iterative OVxDM coded transmissions are performed.

[0094] see Figure 8 , which is a flowchart of specific implementation steps in Embodiment 2 of the present invention, including:

[0095] Step S201, designing several iterative combinations (more than or equal to two types), the iterative combinations include overlapping code constraint lengths and overlapping times respectively corresponding to two or more iterative overlapping multiplexing codes. Preferably, the link performance of concatenated overlapping codes corresponding to various iterative combinations designed can change evenly with the change of SNR.

[0096] For example, design four quadratic iterative combinations as:

[0097] The first iterative combination: (L1, K1; L2, K2), in the first iterative combination, it means that the modulation symbols are subjected to the first-level overlapp...

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Abstract

The invention discloses an overlapping multiplex transmission method, a base station and a user terminal. The method comprises the following steps: the quality of an up link and/or a down link between the base station and the user terminal is acquired; a combination or an iteration combination of L and K of the up link and/or the down link meeting the requirement of service data transmission quality can be selected from predetermined more than one combinations or iterations of overlapping encoding constraint lengths L and overlapping frequencies K of overlapping complex codes for the user terminal according to link quality; service data interacted between the base station and the user terminal is transmitted after the service data is subject to overlapping complex coding by the selected combination or iteration combination of the L and the K. With the invention, the reliability of data transmission can effectively ensured, and the efficiency of system transmission can further improved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to an overlapping multiplexing transmission (OVxDM) method, and a base station and a user terminal with the overlapping multiplexing transmission function. Background technique [0002] The overlapping multiplexing transmission technology performs overlapping transmission of multiple parallel low-order modulation signals in the time domain, frequency domain, or code domain. Such as figure 1 Shown is a schematic diagram of OVTDM, the transmit symbol period is T s , in order to improve the signaling rate, the transmitted symbol interval is forcibly reduced to T s / K. According to the basic linear superposition principle of linear systems, such symbol superposition will not expand the signal bandwidth. Therefore, the spectral efficiency of the system is improved by K times. That is, by artificially manufacturing overlapping interference between symbols, high-efficiency data t...

Claims

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Application Information

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IPC IPC(8): H04L1/06H04B1/707H04W88/08H04W88/02H04L1/00
Inventor 刘光毅韩璐黄宇红
Owner CHINA MOBILE COMM GRP CO LTD
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