Double weighting parallel interference cancellation method under multibeam and related receiving device

Abstract

The invention provides a multiwave beam double-layer weighing parallel interference offsetting method, used in intelligent antenna-used CDMA system and including the steps: receiving antenna array cell signal and forming several wave beam signals of each user; searching and obtaining multipath time delay information of each user; making multistage parallel interference offset processing to obtain soft output signals of each user; by decoding, obtaining bit sequence sent by each user. It also provides a corresponding receiving device to the method, including: user wave beam forming unit to receive antenna array cell signal and generate user wave beam information; multipath searcher to obtain user multipaht time delay information; inference offsetting device; user decoder to decode to obtain the user-sent bit sequence. It can effectively overcome the influence of multiple access interference on CDMA system and further improves CMDA system capacity, covering range and property.

Description

technical field [0001] The present invention relates to the field of mobile communication, in particular to a double-layer weighted parallel interference cancellation method under multi-beam and a corresponding receiving device, in particular, to a double-layer weighted parallel interference pair under multi-beam in a CDMA (Code Division Multiple Access) system Cancellation method and corresponding receiving device. Background technique [0002] Wideband Code Division Multiple Access (WCDMA) is one of the three mainstream standards of the third-generation mobile communication system solution, and it is also based on CDMA technology. The CDMA system has become the development direction of the third generation mobile communication because of its advantages of high capacity, high service quality and good security. CDMA relies on signature codes to distinguish users, which will lead to two problems in the mobile communication environment, namely multipath interference and multi...

AI Technical Summary

Problems solved by technology

However, this kind of system has a large amount of calculation, and the amount of calculation will increase sharply with the increase of the number of array elements, and the convergence speed of the system will decrease sharply with the increase of the number of array elements.

Therefore, the adaptive smart antenna system has complex structure and high implementation cost

[0012] Both the multi-user detection technology and the smart antenna technology can improve the capacity, coverage and performance of the CDMA system. However, the improvement of the system capacity, coverage and performance is limited if any one technology is applied alone.

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