Bit and power distribution method and apparatus used for distributed antenna system
A distributed antenna and allocation method technology, applied in diversity/multi-antenna systems, selection devices, space transmit diversity, etc., can solve inaccurate bit and power allocation results, service quality can no longer be guaranteed, channel estimation is inaccurate, etc. problem, achieve the effect of practical bit and power allocation algorithm, reduce overhead, and reduce power consumption
Inactive Publication Date: 2008-12-10
SOUTHEAST UNIV +1
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When the antenna configuration and the number of terminals are determined, the feedback period becomes a key parameter affecting the feedback overhead: if the feedback period is short, the channel estimation is accurate, resulting in accurate bit and power allocation results, but the feedback overhead is large; if the feedback period is long, the The channel estimation is inaccurate, making the results of bit and power allocation inaccurate, but the feedback overhead is small
[0005] Therefore, traditional bit and power allocation methods can only make a trade-off between feedback overhead and performance: in order to meet the requirements of feedback overhead that the actual system can support, performance has to be sacrificed
In addition, the goal of bit and power allocation is to minimize the required transmission power under the premise of satisfying the quality of service; however, when the feedback cycle becomes longer and the system performance decreases, the quality of service can no longer be guaranteed
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[0042] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0043] In the following description, the antenna unit in the distributed antenna system and the base station and repeater in the repeater-based cellular system are collectively referred to as the distributed antenna unit, and the distributed antenna system and the repeater-based cellular system Collectively referred to as distributed antenna systems.
[0044] In the distributed antenna system, the downlink transmit antenna units (each antenna unit includes at least one antenna) are geographically distributed differently, and the large-scale fading components are also different in the channel responses from different transmit antenna units to the receive antennas; Moreover, the large-scale fading is a slowly time-varying component, that is, it change...
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The invention discloses a bit and power distribution method used in the distributivity antenna system and a device thereof, including: A. receiving the large scale fading information corresponding to each transmitting antenna by the base station; B. performing the bit and power distribution according to the large scale fading information. The method and the device realizes the reduced power consumption to the maximum extent when ensuing the average service quality, e.g. under the premise of throughput and average error rate performance.
Description
technical field [0001] The present invention relates to a distributed antenna system, in particular to a bit and power distribution method and device for a distributed antenna system. Background technique [0002] Future mobile communications can provide users with high-speed multimedia data transmission services, so communication networks need to provide high data transmission capabilities, such as hundreds of megabits per second or even higher. For the network structure of the next generation mobile communication, in addition to the structure of the traditional cell, the distributed antenna system (Distributed Antenna System) and the cellular structure based on the relay (Relay-Based Cellular) are also important candidate cell structures. In the distributed antenna system, the antenna units of the base station are distributed in different positions in the cell; in the cellular structure based on the repeater, the base station and the repeater are also located in different ...
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IPC IPC(8): H04B7/04H04B7/005H04Q7/30
CPCY02D30/70
Inventor 尤肖虎王新宇赵新胜刘竞秀佘小明陈岚
Owner SOUTHEAST UNIV