Base station device

Abstract

The invention provides a base station device, capable of effectively using the frequency domain and making the communication quality as better as possible when performing the wireless communication based on OFDMA and the wireless communication based on other way in the same frequency domain with the above communication based on OFDMA. The base station device for performing the wireless communication system based on a new-generation PHS way and the current PHS way in the new-generation PHS way frequency domain, comprises: a ECP processing unit (36) for using a window function to control the sidelobe clutter of the wireless communication signal direct towards the sample from the sending data based on the new-generation PHS way; a carrier detection unit (18) for determining the frequency of the carrier in the use of the current PHS way; a sampling number determination unit (19) for determining the sampling number based on the carrier frequency determined by the carrier detection unit (18) and using the window function direct towards sampling according to the sampling number of the sampling number determination unit (19).

Description

technical field [0001] The present invention relates to a base station apparatus that performs communication by an OFDM method or an OFDM multiple access method. Background technique [0002] In the PHS (Personal Handy-phone System), although the commercialization of the next-generation PHS with high communication speed is gradually formed, the base stations of the new-generation PHS are not installed all over the country, but are mainly deployed in the center of the city. Therefore, the existing PHS does not disappear quickly, but the existing PHS is currently used in the form of coexistence with the new generation of PHS. [0003] The new generation of PHS communicates through OFDMA (Orthogonal Frequency Division Multiplexing Access). In the OFDMA scheme, a plurality of carriers called subcarriers having a predetermined frequency at the center are used, and subcarriers of respective adjacent frequencies are transmitted orthogonally to each other. A problem in the OFDMA s...

AI Technical Summary

Problems solved by technology

In the area where the existing PHS and the new-generation PHS coexist, when the allocation of the carrier of the existing PHS terminal in communication is no longer allowed, when the existing PHS terminal to communicate in the area is carried out When making a call, if the base station of the new-generation PHS does not sufficiently reduce the sidelobe clutter (the part surrounded by oblique lines) of the signal in the frequency domain for PFDM, as Figure 8 As shown in , since the side lobe clutter is large, the carrier for the calling party cannot be allocated even though there is space in the frequency band used by the new generation PHS

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