Synchronization sequence sending and receiving methods for realizing synchronous access and corresponding device
A technology for synchronizing sequences and sequences, applied in the directions of synchronizing devices, electrical components, transmission systems, etc., can solve the problems of slow terminal access process, complicated synchronization sequence design and transmission, etc., and achieve the effect of speeding up the access process.
Active Publication Date: 2011-01-05
ZTE CORP
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Problems solved by technology
The bandwidth range of the next-generation broadband wireless access system is increasing. If the base station designs and transmits the synchronization sequence according to the traditional synchronization channel design method, the design and transmission of the synchronization sequence will be very complicated, and the terminal access process will be very slow.
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[0053] The sending and receiving method and the corresponding device for realizing synchronous access provided by the present invention have the inventive idea that the base station transmits the primary preamble and the secondary preamble using the extended sequence structure in the super frame, and the scalable sequence structure includes basic Sequence structures and extended sequence structures. The basic sequence structure refers to dividing the secondary preamble sequence with the shortest sequence length corresponding to the lowest system bandwidth into N basic sequence sub-blocks, and mapping the N basic sequence sub-blocks to the corresponding secondary preamble sub-carrier sets in sequence Above; the extended sequence structure refers to partial repetition or complete repetition of N basic sequence sub-blocks that are equal to the secondary preamble sequence corresponding to the minimum system bandwidth and greater than the shortest sequence length, and the repeated s...
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The invention discloses synchronization sequence sending and receiving methods for realizing synchronous access and a corresponding device. The sending method comprises that: a base station forms auxiliary lead code sequences by a plurality of fundamental sequence subblocks or obtains the auxiliary lead code sequences by expanding the plurality of fundamental sequence subblocks according to the lengths of the auxiliary lead code sequences which correspond to different system bandwidths, modulates the auxiliary lead code sequences, and sequentially maps the auxiliary lead code sequences to subcarriers in an auxiliary lead code subcarrier set, wherein the number of the subcarriers is equal to the length of the auxiliary lead code sequences; and the base station sends a main lead code containing system bandwidth information and one or more of auxiliary lead codes containing cell and / or sector information in a superframe. Through the design of a fundamental auxiliary synchronization sequence, the expansion of channel bandwidths with different configurations is supported, the requirement of expandability of a next-generation broadband access system is met, and the process of accessing a terminal can be greatly accelerated.
Description
technical field [0001] The invention relates to a time-frequency domain synchronization technology of digital communication, in particular to a synchronization sequence sending and receiving method and a corresponding device for synchronous access of a mobile communication system. Background technique [0002] As a multi-carrier transmission mode, Orthogonal Frequency Division Multiplexing (OFDM, Orthogonal Frequency Division Multiplex) makes the system frequency-selective to multipath fading channels by converting a high-speed transmission data stream into a set of low-speed parallel transmission data streams. The sensitivity of the system is greatly reduced; and the introduction of the cyclic prefix further enhances the ability of the system to resist Inter-symbol Interference (ISI, Inter-symbol Interference). In addition, the characteristics of high bandwidth utilization and simple implementation make OFDM more and more widely used in wireless communication domains. For ...
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IPC IPC(8): H04L27/26H04W56/00H04W72/12H04W88/08H04B1/707
Inventor 方惠英方正
Owner ZTE CORP