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Asymmetric frequency band TDD communication system for asymmetric communication system

A communication system and asymmetric technology, applied in the field of communication, can solve the problems of high implementation cost and terminal implementation cost, and achieve the effect of reducing implementation cost

Inactive Publication Date: 2015-10-21
江苏技睿通信科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In general, implementing a receiver system with high physical bandwidth means higher implementation cost
In addition, the implementation cost of the receiver usually far exceeds the implementation cost of the transmitter
Therefore, in the current symmetrical design scheme, the terminal implementation cost is very high

Method used

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  • Asymmetric frequency band TDD communication system for asymmetric communication system

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings.

[0011] When designing the TDD communication transmission system for the monitoring system, the current design schemes all adopt symmetrical physical bandwidths of the uplink and downlink, so that the implementation cost of the terminal equipment is usually relatively high. The present invention proposes an asymmetric scheme in which the physical bandwidth of the uplink is greater than that of the physical bandwidth of the downlink, as shown in the attached figure 1 shown.

[0012] Because OFDM technology is widely used in various communication systems now, and the core of OFDM is FFT transformation, a simple and feasible design scheme can be adopted for the TDD asymmetrical system using OFDM. Usually, the uplink physical bandwidth can be designed as an integer N times the downlink physical bandwidth, where N is an integer greater than or equal to 2. For example, if t...

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Abstract

The invention discloses an asymmetric frequency band TDD communication system for an asymmetric communication system. The asymmetric frequency band TDD communication system uses an asymmetric solution that an uplink physical bandwidth is more than downlink physical bandwidth, and reduces the implementation cost of a terminal via a asymmetric frequency band TDD transmission method so as to reduce the implementation cost of the whole communication system.

Description

technical field [0001] The invention belongs to the technical field of communication. Background technique [0002] In a communication system such as a monitoring system, the downlink channel is often used to transmit control commands, and the bandwidth occupation is usually small; but the upload channel often needs to transmit multimedia data such as video and audio, which requires high bandwidth. TDD (Time Division Multiplexing) technology is also often used in point-to-point and point-to-multipoint monitoring systems to realize uplink and downlink transmission on the same frequency band. The current TDD-based point-to-point and point-to-multipoint monitoring system transmission designs are generally symmetrical communication systems, that is, the uplink and downlink use the same physical communication channel, such as 10MHz and 5.8GHz physical channels. In such a communication system, the terminal must also implement a receiver system with the same bandwidth as the centr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00
CPCH04L5/0005H04L5/0037
Inventor 黄锋李焱
Owner 江苏技睿通信科技有限公司