Activation code path detecting method for multi-antenna association detecting system

Abstract

The present invention discloses an activation code channel detecting method which is applied on the multiple-antenna combined-detecting system, and the method comprises the following steps: A. executing channel estimating window activating detection according to the multiple-antenna channel estimation after the noise threshold detection; B. executing matched filtering respectively to each antenna according to the activation detecting result of the channel estimating window, summating the symbol of same code channel of multiple-antenna at a same window position according to the result of matched filtering, and executing interference-user non-preferred code channel activation detecting according to the summated symbols; and C. executing combined detection interference eliminating to the summated symbols according to the activation detecting result of the interference-user non-preferred code channel, and executing non-preferred code channel activation detection to the symbol executed with interference elimination. The method according to the invention leads to the reducing of the demodulating threshold at the state of no increasing the band width thereby increasing the system throughout, and at the same time the coverage of the service can be increased.

Description

technical field [0001] The invention relates to a multi-antenna joint detection technology in the communication field, in particular to an active code channel detection method applied to a multi-antenna joint detection system. Background technique [0002] Multi-antenna technology can effectively resist the fading of the wireless channel and improve the channel capacity of the wireless channel, and it has attracted more and more attention in the communication system. Compared with the single-antenna system, multi-antenna technology is used at the receiving end to combine the signals received on each antenna to obtain multi-antenna diversity gain and reduce the power requirement for each antenna. In the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, the terminal adopts the multi-antenna joint detection algorithm. For high-speed services such as High-speed Packet Access (HSPA), it can improve the service throughput and reduce the demodulation thresh...

AI Technical Summary

Problems solved by technology

[0003] Existing multi-antenna systems are generally combined with space-time coding and other multiple-input multiple-output (MIMO) technologies to perform space-time joint detection. Diversity gain and coding gain can be obtained in space, but the detection algorithms are relatively complicated.

In the TD-SCDMA system, the base station uses a smart antenna, which can achieve diversity reception in system implementation, but at this time the distance between the antennas is relatively small (two adjacent antennas are generally 1 / 2 wavelength), and the correlation between the antennas is relatively small. Strong, multi-antenna signals are combined and received at the receiving end, and the diversity gain obtained by completely independent multi-antenna diversity is much smaller. Moreover, the number of smart antenna elements is generally greater than or equal to 4. As the number of antennas increases, the complexity Geometric growth, which undoubtedly increases the difficulty of system implementation

Images