Novel OFDM system multi-carrier path combining method

Abstract

The invention provides a new multi-carrier combination method of an OFDM system and a system thereof. In the method, carrier wave data(N in number) are combined prior to the treatments of adding cyclic prefix, shaping and filtering, and D / A conversion, then inverse fast Fourier transform(IFFT)is carried out, thus accomplishing orthogonal frequency division multiplexing in the carrier waves and achieving combination of divided frequency among the carrier waves. Compared with conventional frequency division combination methods based on sinusoidal wave spectrum conversion, the combination method is easy to realize and is low in computational complexity; the method reduces carrier wave supplying pieces and is dispensed with a plurality of intermediate frequency combiners and dividers, thus reducing hardware cost.

Description

technical field [0001] The method relates to an Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplexing) multi-carrier communication system, in particular to a baseband combining method for an Orthogonal Frequency Division Multiplexing multi-carrier. Background technique [0002] At present, WiMAX develops rapidly and has become one of the 3G standards, and the commercialization process is constantly advancing. However, the WiMAX protocol's support for 20MHz bandwidth is not perfect, which limits the system capacity to a certain extent. OFDM multi-carrier system is of great significance in solving this problem and further increasing the capacity of OFDM system. At the same time, the OFDM multi-carrier system also has the following advantages, such as good system compatibility, flexibility in bandwidth requirements, and low cost of hardware equipment. Therefore, driven by market demand, multi-carrier has become an important direction for ...

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Problems solved by technology

The hardware circuit is complex, expensive, difficult to debug and difficult to adjust

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