Uplink Control Signal Diversity via Bit Segmentation
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Solution Overview
Problem
Current radio communication systems face challenges in enhancing transmit diversity, particularly in LTE, where the existing methods fail to effectively reduce cross-channel and multipath interference, leading to suboptimal performance in signal reception.
Innovation Solution
The solution involves segmenting uplink control bit sequences into groups, encoding each group for error correction, and mapping symbols to different antenna ports for diversity transmission, utilizing techniques such as bit segmentation, error correction encoding, and symbol mapping to enhance transmit diversity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If transmit diversity is implemented by sending signals from different antennas, then signal reception reliability is improved, but cross-channel and multipath interference is not effectively reduced
Solution Approach 1:
The patent segments the coded bits into different groups and assigns them to different antenna ports for transmission. This segmentation ensures that bits from the same codeword are transmitted through multiple antennas, providing diversity while reducing the impact of cross-channel and multipath interference on the overall signal reception.
2Device complexity
If all coded bits are transmitted from a single antenna, then device complexity is reduced, but transmit diversity performance is insufficient
Solution Approach 1:
The patent divides coded bits into different groups and assigns them to different antenna ports. This segmentation approach enables transmit diversity without requiring complex reconfiguration of the transmission system, as each antenna transmits a subset of the coded bits independently.
Solution Approach 2:
The patent introduces spatial diversity by transmitting coded bits across multiple antenna ports, adding a spatial dimension to the transmission. This dimensional expansion improves reliability without significantly increasing device complexity, as the segmentation and assignment process follows a systematic approach.
3Reliability
If bits from the same codeword are transmitted from different antennas, then diversity order is increased, but signal processing complexity increases
Solution Approach 1:
The patent segments coded bits into different groups and assigns them to different antenna ports in a systematic manner. This segmentation ensures that bits from the same codeword are transmitted through multiple antennas, increasing diversity order while maintaining manageable signal processing complexity through structured assignment.
Data Source
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AI summary
Sequences of pre-coded radio control signals are rearranged to enhance diversity transmission. In one example, a sequence of uplink control bits is segmented to form a plurality of groups. The bits of each of the plurality of groups are error correction encoded and encoded into symbols. The symbols are mapped to different ports for diversity transmission through a plurality of ports.