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Method for sending downlink pilot frequency in special network communication system

A communication system and private network technology, applied in the field of mobile communication, can solve problems such as affecting system demodulation performance, affecting channel estimation and channel measurement accuracy, etc.

Inactive Publication Date: 2014-05-14
POTEVIO INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Affect the accuracy of channel estimation and channel measurement, and then affect the demodulation performance of the system

Method used

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  • Method for sending downlink pilot frequency in special network communication system
  • Method for sending downlink pilot frequency in special network communication system
  • Method for sending downlink pilot frequency in special network communication system

Examples

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Embodiment Construction

[0023] In the present invention, a dedicated pilot resource group is set for each subband in the private network communication system, and in the dedicated pilot resource group, the pilots of different cells are distinguished through code division to achieve anti-co-channel interference the goal of.

[0024] In order to make the technical principles, features and technical effects of the technical solution of the present application clearer, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0025] The flow of a method for sending downlink pilots in a private network communication system provided by an embodiment of the present application is as follows: Figure 4 shown, including:

[0026] Step 401: Set a specific OFDM symbol in each subband as a pilot resource group. Preferably, the number of OFDM symbols serving as pilot resource groups is 3, and the distance between adjacent OFDM symbols serving...

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Abstract

The invention discloses a method for sending a downlink pilot frequency in a special network communication system. The method comprises: A, arranging a specific OFDM symbol in each sub-band as a pilot frequency resource group; B, for each OFDM symbol bearing a pilot frequency in the pilot frequency resource group, generating a piece of pilot frequency symbol data; and C, according to the generated piece of pilot frequency symbol data, generating eight pieces of pilot frequency symbol data through an eightfold spread spectrum mode, and performing mapping on eight resources units of an OFDM symbol bearing a pilot frequency, the pilot frequencies of different districts employing different spreading codes. By applying the scheme provided by the invention, the pilot frequency of a local district can be protected from the interference of neighboring district services or neighboring district pilot frequencies.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular to a method for sending downlink pilots in a private network communication system. Background technique [0002] The private network communication system occupies discontinuous spectrum bandwidth, and its schematic diagram is as follows figure 1 shown. Each 25kHz is a subband. There are a maximum of 480 subbands. A radio frame length of each subband of the private network system is 25 ms, including 45 OFDM symbols. Such as figure 2 As shown, the downlink resource occupies 13 OFDM symbols, the random access resource includes 4 OFDM symbols, and the uplink resource includes 27 OFDM symbols. [0003] The downlink pilot pattern in a subband of the private network communication system is as follows: image 3 As shown, the gray mark indicates the location of the pilot. Each OFDM symbol has a resource element (RE, Resource Element) as a pilot, and the pos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/14H04L5/00
Inventor 王丽冯绍鹏雷旭王单
Owner POTEVIO INFORMATION TECH CO LTD
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