Cooperative diversity transmission method of radio base station and cellular communication base station

A technology of broadcast base station and cellular communication, applied in the field of communication, can solve the problems such as the inability to further effectively improve the frequency spectrum efficiency of broadcast signal broadcast and communication fusion network in edge areas, and affect the user experience of broadcast services, so as to improve the network capacity and coverage effect. Effect

Active Publication Date: 2013-12-25
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Application Information

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Problems solved by technology

However, this simple relay transmission method cannot further effectively improve the quality of broadcast signals in edge areas and th

Method used

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  • Cooperative diversity transmission method of radio base station and cellular communication base station
  • Cooperative diversity transmission method of radio base station and cellular communication base station
  • Cooperative diversity transmission method of radio base station and cellular communication base station

Examples

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Effect test

Embodiment 1

[0035] This embodiment provides a specific implementation method of a cooperative diversity transmission method between a broadcast base station and a cellular communication base station, and its process is as follows figure 1 shown, including the following steps:

[0036] S1, the broadcasting base station broadcasts the sending signal [X 1 x 2 x3 x 4 ...], the user and each communication base station (communication base stations in the present invention all refer to cellular communication base stations) receive the transmission signal of the broadcast base station; the broadcast base station can be wired or wireless, or even laid between the broadcast base station and the cellular network communication base station The optical fiber sends the signal to each cellular communication base station.

[0037] S2. At the edge of the broadcast area, due to the influence of various unfavorable factors such as shadow fading, frequency selective fading, Rayleigh fading, and Doppler...

Embodiment 2

[0048] This embodiment provides a cooperative diversity transmission method between a broadcast base station and a cellular communication base station. The application scenarios of this method are as follows: figure 2 As shown, the broadcast base station and the communication base station use space-frequency coding to perform cooperative diversity transmission.

[0049] The process of cooperative diversity transmission between a broadcasting base station and a single communication base station using space-frequency coding is as follows: the transmitted data symbol vector X is coded into a vector [X 1 x 2 x 3 x 4 …]and where X 1 and x 2 correspond to subcarrier signals at corresponding positions in the frequency domain, and the symbol * represents the complex conjugate of the signal. At this time, the vector sent by the broadcast base station is: [X 1 x 2 x 3 x 4 …], the data sent by the communication base station is: In the frequency domain [X 1 x 2 x ...

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Abstract

The invention provides a cooperative diversity transmission method of a radio base station and cellular communication base stations. The cooperative diversity transmission method comprises steps that the radio base station broadcasts and transmits original signals [X1 X2 X3 X4...]; and at the same time, a first cellular communication base station, in cooperation with the radio base station, transmits signals [-X2*X1* -X4*X3*...] to a subscriber, wherein X1, X2, X3 and X4 are data vectors with the identical length, and the symbol * represents the complex conjugation of signals; a second cooperative transmission cellular communication base station, in cooperation with the radio base station, transmits signals [X3 X4 X1 X2...] to the subscriber; and a third cooperative transmission cellular communication base station, in cooperation with the radio base station, transmits signals [-X4*X3* -X2*X1*...] to the subscriber. According to the cooperative diversity transmission method, no change on the radio transmission signals is needed, that is, on the condition of not influencing original radio reception, signals orthogonal to radio signals are transmitted by the cellular communication base stations, and thus cooperative diversity transmission is formed, and the network capacity and the coverage effect of the radio transmission in a hybrid network of radio and cellular communication are improved.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a cooperative transmission method, in particular to a cooperative diversity transmission method of a broadcast base station and a cellular communication base station. Background technique [0002] With the rapid development of the world's economy and culture, mobile users' demand for information services is increasing rapidly; in wireless networks, more than 66% of users' total demand for mobile information services comes from video services, and more than 90% of users' video service needs are concentrated 10% of certain video content. In order to cope with the rapid growth of demand for information services, the optimal transmission of mobile information services cannot be achieved by relying solely on traditional broadcast networks or traditional two-way communication networks. The traditional broadcasting network adopts a large-area network, which has a large coverage are...

Claims

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Application Information

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IPC IPC(8): H04W4/06H04B7/02H04L1/00
Inventor 李明齐芮赟魏冬冬
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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