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Multiple base station broadcast system and method

A broadcasting system and multi-base station technology, applied in the field of wireless broadcasting communication, can solve the problems of not being able to overcome the influence of multipath effect and increase the cost of broadcasting system, and achieve the purpose of reducing the influence of multipath effect, reducing bit error rate, and high frequency spectrum The effect of utilization

Active Publication Date: 2011-04-13
INST OF COMPUTING TECH CHINESE ACAD OF SCI
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Problems solved by technology

The disadvantage of this prior art is that the data received on the antenna of the receiving unit still cannot well overcome the impact of multipath effects, and an equalizer may be needed for further interference elimination, thereby increasing the cost of the broadcasting system

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  • Multiple base station broadcast system and method

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Embodiment Construction

[0048] The present invention will be described in detail below in conjunction with the drawings.

[0049] Space-time coding is to encode data in the two-dimensional direction of the space domain and time domain. There are roughly three ways of space-time coding: Space Time Trellis Codes (STTC); Space Time Block Codes (Space Time Block Codes, STBC); Layered Space Time Codes (LSTC).

[0050] (1) Space-time trellis code (STTC): The space-time trellis code was first proposed by V. Tarokh et al. In this space-time coding system, the Viterbi decoding algorithm is used for decoding at the receiving end. The code of the space-time trellis code design can provide the maximum coding gain and diversity gain without losing bandwidth efficiency. The maximum diversity gain is equal to the number of transmitting antennas.

[0051] (2) Space-time block code (STBC): Although the space-time trellis code can obtain great coding gain and diversity gain, due to the use of Viterbi decoding at the receiv...

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Abstract

The invention discloses a multi-base station broadcasting system and a broadcasting method thereof. The broadcasting system is composed of a base station group controller, a plurality of base stations and at least one terminal, wherein the terminal is composed of a receiving unit; the base station group controller carries out space time coding on data to be sent so as to form code blocks, and sends data in the code blocks and the codes of the base stations to corresponding base stations; the base stations are used for sending the data and the code sequences of the base stations; and the receiving unit is used for receiving and decoding the data and the code sequences of the base stations. The broadcasting method comprises the steps: space time coding is carried out to the data to be sent so as to form the code blocks, and the data in the code blocks and the code sequences of the base stations are sent to the corresponding base stations; each base station sends the data and the code sequences of the base stations; and the receiving unit receives and decodes the data of the code blocks and the code sequences of the base stations. The invention achieves the purpose of reducing the influence of multipath effect through the effective combination of a multi-base station technology and a space time coding technology.

Description

Technical field [0001] The present invention relates to the field of wireless broadcast communication, and in particular to a multi-base station broadcast system and broadcast method based on Space Time Coding (STC). Background technique [0002] With the development of wireless communication technology, there have been major innovations in traditional wireless broadcast communication technology. In order to meet the requirements of the future 4G network, the wireless broadcasting system began to gradually develop from the coverage of large base stations to the coverage of multiple small base stations. The emergence of single frequency networks is a manifestation of this trend. [0003] The single-frequency network adopts the macrodiversity technology, and uses the same frequency to synchronously transmit the same broadcast data on each cell base station, so as to achieve the purpose of more effective use of spectrum resources. [0004] The macrodiversity technology is when the term...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/02H04W4/00H04H20/18H04L12/16
Inventor 袁珏杨育波蒋海平田霖杨树伟石晶林
Owner INST OF COMPUTING TECH CHINESE ACAD OF SCI
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