Broadcast Receiver TxID Cancellation for Better Decoding
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Solution Overview
Problem
Conventional transmitting apparatuses experience performance degradation of 0.02 dB to 2 dB due to the transmission of TxID signals, which appear as noise in receiving apparatuses, affecting decoding performance.
Innovation Solution
A receiving apparatus with a TxID detection unit, processing unit, and reduction unit that changes the frequency band of the TxID signal and reduces its impact from the received signal, and a transmitting apparatus that determines TxID transmission and generates additional parity bits for improved decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If TxID signal is transmitted in the preamble symbol position, then transmitter identification and location-based services are enabled, but decoding performance degrades by 0.02 dB to 2 dB due to the TxID appearing as noise
Solution Approach 1:
The harmful TxID signal components are extracted and removed from the received signal before decoding. The receiving apparatus detects the TxID signal in the preamble, extracts it using correlation processing, and subtracts it from the received signal to prevent it from degrading the decoding performance of subsequent data symbols.
Solution Approach 2:
The receiving apparatus performs preliminary detection and removal of the TxID signal from the preamble before the main decoding process. By anticipating and eliminating the harmful interference in advance, the system prevents the 0.02-2 dB performance degradation that would otherwise occur during decoding.
2Reliability
If additional parity bits are generated and transmitted in separate frames, then decoding performance is improved through enhanced error correction, but transmission overhead and frame structure complexity increase
Solution Approach 1:
Additional parity bits for L1 signaling are generated and transmitted in advance in a first frame, before the main L1 signaling data is transmitted in subsequent frames. This preliminary transmission of redundancy information allows the receiver to perform more robust error correction without complicating the overall frame structure, as the additional parity is integrated into the existing frame format.
Data Source
AI summary
A reception device is disclosed. The reception device comprises: a reception unit for receiving a signal including at least one of a channel estimation signal, a transmitter identification (TxID) signal, and a preamble signal; a TxID detection unit for detecting the TxID signal from the received signal; a TxID processing unit for changing the frequency band of the detected TxID signal, on the basis of a result of the detection of the TxID signal; and an attenuation unit for attenuating the TxID signal in the received signal by using the TxID signal having the changed frequency band.