Wireless Transmitter Preamble Sequence Grouping for Stream Detection
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Solution Overview
Problem
The existing radio transmission and reception systems fail to reliably specify the number of multiplexed streams and decode data signals correctly when the channel quality between the main antenna of the radio transmission apparatus and the radio reception apparatus is poor, leading to incorrect detection of preamble sequences.
Innovation Solution
A radio transmission apparatus and reception apparatus are designed with a determination section to determine the number of streams, a grouping section to group preamble sequences, a selection section to select the appropriate group, and a generation section to generate preamble sequences, allowing reliable detection and decoding even when preamble sequences from any antenna are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single main antenna preamble sequence is used for detecting the number of multiplexed streams, then the detection process is simple, but the detection reliability deteriorates when channel quality is poor
Solution Approach 1:
The invention segments the single main antenna preamble sequence into multiple antenna port preamble sequences, where each antenna port transmits its own dedicated preamble sequence. This segmentation allows the receiving apparatus to detect preamble sequences from multiple antenna ports independently, thereby improving detection reliability when channel quality is poor, while maintaining relatively simple detection processes through correlation operations.
2Reliability
If preamble sequences are transmitted from multiple antenna ports, then detection reliability improves, but the system complexity increases
Solution Approach 1:
The invention makes each antenna port capable of transmitting preamble sequences with the same functional structure and format. The receiving apparatus uses a universal correlation-based detection method that works for all antenna ports simultaneously, avoiding the need for complex port-specific detection algorithms. This multi-functionality approach improves reliability through diversity while maintaining system simplicity.
3Ease of operation
If the radio reception apparatus blindly detects preamble sequences to specify the number of multiplexed streams, then no additional signaling is needed, but detection fails when channel quality is poor
Solution Approach 1:
The invention introduces a feedback mechanism where the receiving apparatus detects preamble sequences from multiple antenna ports and uses this detection feedback to reliably specify the number of multiplexed streams. The correlation detection results from multiple antenna ports provide redundant feedback information, enabling accurate stream number specification even when individual channel qualities are poor, without requiring additional explicit signaling.
Data Source
AI summary
Provided is a wireless transmitter capable of accurately specifying the number of multiplexed streams and correctly decoding the data signals when a preamble sequence transmitted from any antenna of a wireless transmitter is detected. In this device, a multiplex count determination unit (101) determines the number of streams used by the device itself from the same number of candidates as the number of spatially multiplexed streams. A sequence group generator (104) forms a plurality of preamble sequences into the same number of groups as the number of candidates, which is the number of streams. A sequence group selector (105) selects the group matching the number of streams determined by the multiplex count determination unit (101) from a plurality of groups. A preamble generator (106) selects the same number of preamble sequences as the number of streams in the group selected by the sequence group selector (105) and generates the preamble sequence used by the device itself.