Method and device for discriminating cell window in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) combined detection
A TD-SCDMA and joint detection technology, applied in the field of the noise window and the signal window discrimination method and the device thereof, can solve the problems of performance degradation, occupation and the like
Active Publication Date: 2012-04-18
芯鑫融资租赁(厦门)有限责任公司
View PDF7 Cites 2 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0010] In order to overcome the problem that the introduction of the noise window will take up the share of 8 joint detection windows, resulting in that the effective same-frequency interference window cannot enter the joint detection and cause a lot of performance degradation, the present invention provides a TD-SCDMA joint detection center The discriminating method and device of the cell window, the window of the cell is discriminated between the signal window and the noise window, the noise window is deleted, and only the signal window is output for joint detection, so as to improve the joint detection performance and achieve the purpose of saving instructions
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0026] The specific embodiments of the present invention will be described below in conjunction with the accompanying drawings.
[0027] see figure 1 As shown, it is a schematic diagram of downlink local cell window activation estimation, which specifically includes the following process:
[0028]First, the radio frequency signal is amplified by a low-noise amplifier (LAN), then demodulated by an I / O demodulation unit, filtered by an amplified low-pass filter, sampled by an analog-to-digital converter, and filtered by a finite impulse response (FIR) filter The data, its training sequence (midamble code) enters the channel estimator (Channel Estimation, CHE) for channel estimation, and the signal window and noise window are judged according to the channel estimation results of the current user and the estimation results of the non-local user.
[0029] see figure 2 As shown, it is a flow chart of the cell window discrimination method, which specifically includes the following...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method and device for discriminating a cell window in TD-SCDMA (Time Division-Synchronization Code Division Multiple Access) combined detection and aims at providing a method for discriminating a noise window and a signal window in combined detection. According to the invention, a user window is judged as a signal window or a noise window according to the relationship between the maximum path position of a user window signal and the maximum path position of a user power maximum window signal; a non-user window is judged as a signal window or a noise window according to the relationship between the maximum path position of a non-user window signal and the maximum path position of the user power maximum window signal and according to the alignment probability of the maximum path position of the non-user window signal and the maximum path position of the user power maximum window signal, and in combined detection, the noise window is deleted but only the signal window is output, so as to improve the performance of combined detection and achieve the purpose of saving instructions.
Description
technical field [0001] The invention relates to a joint detection method, in particular to a method and a device for discriminating noise windows and signal windows in joint detection. Background technique [0002] Joint detection is a multi-user detection scheme in TD-SCDMA technology. Joint detection detects multiple users at the same time and minimizes the multiple access interference of all users, thereby increasing the user load of each carrier. However, in the TD-SCDMA communication system, there are more than three ways to allocate the training sequence (Midamble), user equipment (UE) specific midamble allocation, default midamble allocation, and public midamble allocation. In an actual network, the most commonly used is the default (default) allocation method. In TD-SCDMA, Midamble is located in the middle of the time slot and has a length of 144 chips. It is constructed from the Midamble basic code with a length of 128 chips. This involves a parameter K, and K=2,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More IPC IPC(8): H04L25/03H04B1/7105
Inventor 董霄剑刘威鑫许佰魁
Owner 芯鑫融资租赁(厦门)有限责任公司