Pilot frequency mapping method and radio communication system

Abstract

Dedicated comb type frequency spectrum is assigned to followed route pilot frequency. User of transmitting data maps the pilot frequency to frequency band to be as user's followed route pilot frequency corresponding to the user data in the dedicated comb type frequency spectrum assigned to followed route pilot frequency. Thus, there is no interference and restriction relation between density of followed route pilot frequency and quantity of user of transmitting data. Moreover, when sending followed route pilot frequency, user of transmitting data does not use resource of frequency spectrum except the dedicated comb type frequency spectrum. In the invention, measuring pilot frequency is not influenced by density of followed route pilot frequency. Thus, when measuring assignment of pilot frequency in remaining frequency spectrum resources, system is not restricted by followed route pilot frequency. The invention also discloses a radio communication system.

Description

technical field [0001] The present invention relates to the technical field of communication system information transmission, in particular to a pilot mapping method and a wireless communication system. Background technique [0002] Single-carrier frequency-division multiple access (SC-FDMA) technology is an emerging technology with low peak-to-average power ratio (PAPR) characteristics, which can ensure orthogonality between users and effective frequency domain equalization at the receiving side. [0003] As shown in Figure 1, it is a schematic diagram of the main technology of single-carrier frequency division multiple access, wherein, first, the time-domain signal shown in 101 is transformed into the frequency domain through Fourier transform (DFT) 102, and then sub-carrier mapping is performed in the frequency domain (Sub-carrier Mapping) 103, the frequency domain signal is mapped to the corresponding sub-carrier, and then converted to the time domain by inverse Fourier ...

AI Technical Summary

Problems solved by technology

[0009] In the above prior art, during the subcarrier mapping process, the pilots of the users who transmit data are mapped to the comb pilots occupying the full frequency in the pilot resources, if the density of the channel-associated pilots is too high, resulting in Limitation on the number of users transmitting data. For example, in Figure 4, if the density of the channel-associated pilots is required to be doubled, that is, it needs to occupy 1 / 2 of the pilot resources, then the maximum number of users transmitting data in the system at the same time is There can be two; in addition, because the channel-associated pilots allocated by the system for data transmission users are not fixed, the system allocates measurement pilots on spectrum resources other than the channel-associated pilots or allocates time-frequency resources for transmitting other information. the constraints of the channel-associated pilot

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