RSSI Measurement Under Pulsed Jamming for Uplink Power Control
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Solution Overview
Problem
Current communication systems face inefficiencies in handling erasures, or information not received, particularly in Random Phase Multiple Access (RPMA) systems, where errors and interference affect data transmission and decoding processes.
Innovation Solution
The implementation of a method and system using forward error correction techniques, specifically Reed Solomon encoding, to create and transmit encoded signals, where the transmission of a second predetermined part of the encoded signal is terminated upon successful decoding by the receiver, with acknowledgments and noise characteristics determining the decoding success.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If forward error correction encoding is applied to compensate for erasures, then reliability of data transmission is improved, but device complexity increases due to encoding and decoding operations
Solution Approach 1:
The patent applies preliminary action by pre-calculating and transmitting redundancy information (erasure compensation data) before the actual data transmission. The encoder generates parity symbols in advance using polynomial multiplication, and these redundancy symbols are included in the transmitted signal. This allows the receiver to reconstruct lost data without requiring complex real-time computation during reception.
Solution Approach 2:
The patent introduces an intermediary mathematical structure (polynomial representation and spectral domain multiplication) to simplify the error correction process. By transforming the encoding operation into polynomial multiplication in the spectral domain, the complex algebraic operations are replaced with simpler frequency-domain computations, reducing device complexity while maintaining reliability.
2Productivity
If transmission is terminated early upon successful decoding, then productivity is improved, but measurement precision deteriorates due to difficulty in determining decoding success in noisy conditions
Solution Approach 1:
The patent implements feedback by having the receiver send an acknowledgment signal back to the transmitter after successful decoding. The transmitter monitors for this feedback and terminates further transmission only when confirmation of successful reception is received. This feedback mechanism ensures that early termination does not compromise data integrity, as the transmitter only stops when it has verified the receiver successfully decoded the message despite noisy conditions.
3Reliability
If redundancy information is transmitted to compensate for erasures, then reliability is improved, but loss of energy increases due to additional transmission
Solution Approach 1:
The patent applies partial action by transmitting only the minimum necessary redundancy information required for erasure correction. Instead of sending complete duplicate data, the system transmits a calculated subset of parity symbols that provide sufficient information for reconstruction of lost data. This reduces the energy cost of redundancy transmission while maintaining the reliability benefits of error correction.
Data Source
AI summary
This disclosure relates to method, device and system for controlling power in a communication system. A plurality of power levels is measured from a received signal that includes a pulsed noise source. The received signal is correlated with a known sequence creating a correlation metric. A signal power is determined based on the correlation metric and the plurality of power levels. An uplink signal is transmitted at a transmit power that is based on the signal power.