Multi-path tracking method and device

A multi-path tracking and ratio technology, applied in the field of multi-path tracking, can solve the problems of low search accuracy, high multi-path position error, and high algorithm complexity, and achieve high search accuracy, reduce block error rate, and increase peak rate Effect

CN103326742AInactive Publication Date: 2013-09-25ZTE CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-09-25
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a multi-path tracking method and device. The method comprises the steps of searching the positions of multiple paths and expanding a certain number of paths in front of and behind the positions of the multiple paths, acquiring the signal to interference ratio of each expanded path and selecting paths needing to be combined according to the signal to interference ratio of each path, carrying out maximal-ratio combining on the symbol level data of the selected paths needing to be combined, and taking the positions of the selected paths needing to be combined as the multi-path tracking positions. According to the multi-path tracking method and device, the problem that multiple path position searching carried out according to correlation technique is high in error is solved, multiple path position searching accuracy is higher, the block error rate of large transmission blocks is reduced, the peak rate of uplink transmission is increased, and extra gain of multiple path combination is obtained.
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Description

technical field

[0001] The present invention relates to the communication field, in particular, to a multipath tracking method and device. Background technique

[0002] In code division multiple access systems, Rake (Rake) receivers are widely used. The multipath searcher is an important part of the Rake receiver, which is responsible for multipath search and allocation. After the Rake receiver searches the multipaths, it performs descrambling and despreading on the searched multipaths, and finally performs maximum ratio combining on the above multipaths. Whether the location of the searched multipath is accurate determines the performance of the receiver. With the further increase of the data transmission rate, higher requirements are placed on the accuracy of the searcher. When the transmission block is very large, the error rate of received data may reach 100% if the multipath position deviates only from the distance of 1 / 8 chip.

[0003] In related technologies, a ma...

Examples

Embodiment Construction

[0035] Hereinafter, the present invention will be described in detail with reference to the drawings and examples. It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0036] In related technologies, a matched filter method is generally used for multipath search, and descrambling and despreading operations are performed on the searched multipaths, and then the maximum ratio combination of the above-mentioned multipaths is performed. Generally, the multipath positions determined by the above-mentioned method The deviation of the multipath position will be caused by the rapid jitter of the multipath position. In order to reduce the impact of the deviation of the multipath position on the performance of high-order modulation and large transmission blocks, the embodiment of the present invention provides a method and device for combining multipath . The following will...