Pilot Sequence Signal Detection in TD-SCDMA Systems
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Solution Overview
Problem
In communication systems like TD-SCDMA, pilot sequence signals often overlap with service data signals, causing cross-interference that degrades detection performance and reduces spectrum utilization and system capacity, especially when propagation delays or other factors lead to overlapping transmissions.
Innovation Solution
A method and system for detecting a pilot sequence signal by extracting the service data signal from the received signal when it is determined to be correct, using techniques such as demodulation, channel decoding, and interleaving to isolate the pilot sequence signal, and applying a weight factor based on the signal-to-noise ratio to suppress interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the service data signal and pilot sequence signal are transmitted in the same time slot to improve spectrum utilization, then spectrum utilization is improved, but the detection performance of the pilot sequence signal deteriorates due to cross-interference
Solution Approach 1:
The patent extracts the service data signal from the received signal that contains both service data signal and pilot sequence signal. By separating the service data signal component, the patent enables subsequent accurate detection of the pilot sequence signal without interference from the service data signal, thus resolving the contradiction between spectrum utilization and detection performance
Solution Approach 2:
The patent segments the received signal into distinct components: service data signal and pilot sequence signal. Through demodulation and channel decoding, the service data signal is isolated and removed, allowing the pilot sequence signal to be detected separately with improved accuracy while maintaining their co-transmission in the same time slot
2Measurement precision
If a guard interval is inserted between service data signal and pilot sequence signal to avoid overlap and improve detection performance, then detection performance is improved, but spectrum utilization deteriorates
Solution Approach 1:
The patent converts the harmful cross-interference between service data signal and pilot sequence signal into a beneficial separation process. By using the known structure and characteristics of the service data signal, the patent extracts and removes it from the received signal, transforming the interference problem into an opportunity for accurate pilot sequence detection without requiring guard intervals
3Measurement precision
If the transmission power of service data signal is limited to reduce interference to pilot sequence signal, then detection performance of pilot sequence signal is improved, but system capacity deteriorates
Solution Approach 1:
The patent introduces signal processing operations (demodulation, channel decoding, extraction) as intermediaries between the transmitted signals and the detection process. These intermediary operations enable the separation and removal of service data signal interference, allowing full transmission power to be used while maintaining accurate pilot sequence detection performance
Data Source
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AI summary
A method for detecting pilot sequence signal includes: when the service data signal in the received signal is confirmed to be right, the said service data signal is extracted from the received signal, wherein, the service data signal and the pilot sequence signal in the received signal are located in the same slot; the pilot sequence signal is obtained from the received signal having been extracted the service data signal. At the same time, a communication device and a communication system are provided. The interference of pilot sequence signal made by the service data signal can be restrained, the detecting performance of the pilot sequence can be enhanced by using the present invention.