Signal transmission method between base station and mobile station
A technology for signal transmission and mobile station, applied in the directions of signal channel, time division multiplexing, multi-frequency code system, etc., can solve the problems of inability to use the system bandwidth OFDM signal transmission method, waste of frequency resources, etc., and achieve frequency selective fading capability Strong, simple to implement, and high spectrum utilization
Inactive Publication Date: 2010-08-18
中科创新发展(北京)科技有限公司
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Problems solved by technology
Due to the limitation of the system bandwidth, the TD-SCDMA system cannot adopt the OFDM signal transmission method with a system bandwidth greater than 1.25MHz, and if the TD-SCDMA system adopts the OFDM signal transmission method with a system bandwidth less than 1.25MHz, precious frequency resources will be wasted
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Characters of the method are that using time division duplexing TDD and orthogonal frequency division multiplex OFDM transfers information of a frame; using frame of forming multiple time slots as well as OFDM signal and switching period including cycle prefix in general time slot of multiple time slots realizes transferring OFDM signal in time-division system. It is convenient to introduce OFDM to TDD system for example, TD-SCDMA system by using the disclosed method. Thus, TDD system possesses inherent strong points such as supporting unsymmetrical operation expediently, and all advantages of OFDM technique such as high capability for resisting fading in frequency selectivity, and high spectrum utilization rate, as well as simple implementation, and features of development in long term for TDD system.
Description
technical field The invention relates to the field of digital communication, in particular to a method for sending time-division duplex signals between a base station and a mobile station based on orthogonal frequency division multiplexing technology. Background technique As a multi-carrier transmission mode, Orthogonal Frequency Division Multiplexing (OFDM) makes the system more sensitive to multipath fading channel frequency selectivity by converting a high-speed transmission data stream into a set of low-speed parallel transmission data streams. The introduction of the cyclic prefix further enhances the ability of the system to resist inter-symbol interference (ISI). In addition, the high bandwidth utilization rate and simple implementation make OFDM more and more widely used in wireless communication domains. For example, WLAN systems, WiMax systems based on Orthogonal Frequency Division Multiple Access (OFDMA), etc. A system based on OFDM technology. At the same time...
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IPC IPC(8): H04L5/22H04L27/26H04L5/02
Inventor 夏树强胡留军毕东艳郁光倪雪松
Owner 中科创新发展(北京)科技有限公司