Pilot Sequence Detection by Service Data Extraction
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Solution Overview
Problem
In communication systems like TD-SCDMA, pilot sequence signals often overlap with service data signals, causing interference that degrades detection performance and reduces spectrum utilization and capacity, especially when propagation delays or other factors lead to cross-interference.
Innovation Solution
A method to detect pilot sequence signals by extracting the service data signal from the received signal when it is determined to be correct, or by using a weight factor based on the power of the service data signal, pilot sequence signal, and noise signal to suppress interference, thereby improving the detection of the pilot sequence signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the pilot sequence signal and service data signal are transmitted in the same time slot to improve spectrum utilization, then spectrum utilization is improved, but the pilot sequence signal detection performance deteriorates due to cross-interference
Solution Approach 1:
The service data signal is extracted and removed from the received signal that contains both the pilot sequence signal and service data signal. By separating and removing the service data signal component, the pilot sequence signal can be detected without interference, thus resolving the contradiction between transmitting both signals in the same time slot and maintaining detection performance
Solution Approach 2:
The received signal containing both pilot sequence signal and service data signal is segmented into separate components. The service data signal is identified and extracted as a separate entity, allowing the pilot sequence signal to be processed independently for detection, thereby eliminating cross-interference while maintaining spectrum utilization efficiency
2Measurement precision
If a guard interval is added between pilot sequence signal and service data signal to avoid overlap, then detection performance is improved, but spectrum utilization deteriorates
Solution Approach 1:
Instead of adding a guard interval that would waste time resources and reduce spectrum utilization, the service data signal is extracted and removed from the received signal. This allows the pilot sequence signal to be detected in the same time slot without interference, achieving both good detection performance and high spectrum utilization without requiring additional guard intervals
Data Source
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.