Self-adaptive bit power allocating method and system of molecular band

An adaptive, ultra-power technology, applied in the field of communication, which can solve the problems of high feedback overhead and high computational complexity

Inactive Publication Date: 2011-06-15
THE PLA INFORMATION ENG UNIV
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a method and system for adaptive bit power allocation of molecular bands, which solves the problem of high computational complexity when ensuring system performance in the current method of adaptive bit power allocation for molecular bands. expensive problem

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Embodiment Construction

[0059] The present invention will be further described below with reference to the drawings and specific embodiments.

[0060] The present invention proposes an efficient molecular band ABPA method for obtaining the minimum bit error rate. The method adopts the method of clustering and random selection for subband division and equivalence, and expands the Fischer method with subcarriers as the allocation unit to The ABPA method uses sub-bands as the allocation unit and improves the method so that it can determine and eliminate multiple unusable sub-bands in one iteration process and improve the screening efficiency.

[0061] The present invention is based on the ABPA-STBC MIMO-OFDM system model, such as figure 1 Shown. Assume in N t Root transmitting antenna and N r In a MIMO-OFDM system with one receiving antenna, the frequency band is divided into N c Subcarriers, assuming N c It is large enough so that each subcarrier can be regarded as a flat fading channel, and GI cyclic pref...

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Abstract

The invention discloses a self-adaptive bit power allocating method and system of a molecular band. The method comprises the following steps that: a sending side determines the width of a subband and divides all subcarriers into a plurality of clusters according to the determined width of the subband and the acquired channel gain values of all the subcarriers; the sending side calculates the equivalent subchannel gain values of the divided clusters and removes a plurality of unavailable clusters with bit numbers being smaller than or equal to 0 in calculation once in a self-adaptive bit power allocating way according to the calculated equivalent subchannel gain values to obtain bit number and transmitting power allocated to each cluster; and the sending side allocates the obtained bit number and transmitting power allocated to each cluster to each subcarrier in the cluster. Due to the application of the invention, the problems that the calculation complexity and the feedback expenses are high while the performance of the system is ensured in the prior self-adaptive bit power allocating method of the molecular band are solved.

Description

Technical field [0001] The present invention relates to the field of communications, in particular to a method and system for adaptive bit power allocation of molecular bands. Background technique [0002] Future wireless communication systems have higher requirements for communication rate and service quality, but are limited by system power, bandwidth and complexity. Communication methods with high spectrum efficiency and high performance are important research and development goals in the field of wireless communication. . A number of important technologies have emerged, such as Orthogonal Frequency Division Multiplexing (OFDM) and Multiple Input Multiple Output (MIMO), etc. The combination of them utilizes the anti-multipath fading characteristics of OFDM technology and the high transmission rate of MIMO technology. The characteristics enable the overall performance of the communication system to be significantly improved without additional power and transmission bandwidth. ...

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H04W52/34H04W52/42
Inventor任修坤张世超季仲梅崔维嘉王大鸣
OwnerTHE PLA INFORMATION ENG UNIV