SRS Antenna-Port Segmentation Across OFDM Symbols
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Solution Overview
Problem
In existing SRS transmission methods, transmitting all antenna ports of an SRS resource on each OFDM symbol results in each antenna port using only a fraction of the transmission power, leading to reduced coverage range and degraded channel estimation accuracy, affecting uplink and downlink performance.
Innovation Solution
Transmitting different antenna ports of an SRS resource on multiple OFDM symbols, reducing the number of antenna ports per symbol to improve transmission power and coverage range, thereby enhancing channel estimation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If all antenna ports of an SRS resource are transmitted on each OFDM symbol, then the transmission completes within fewer symbols, but each antenna port uses only a fraction of the transmission power, reducing coverage range and channel estimation accuracy
Solution Approach 1:
The patent segments the transmission of antenna ports across multiple OFDM symbols. Instead of transmitting all N antenna ports simultaneously on one symbol, the transmission is divided into multiple symbols where different subsets of antenna ports are transmitted on each symbol. This segmentation allows each antenna port to receive adequate transmission power while completing the full antenna port transmission across the segmented symbols, thereby resolving the contradiction between transmission efficiency and channel estimation accuracy.
2Device complexity
If all antenna ports are transmitted on each OFDM symbol, then the transmission structure is simple, but the coverage range of SRS is reduced due to insufficient power per antenna port
Solution Approach 1:
The patent applies segmentation by dividing the antenna port transmission across multiple OFDM symbols. Each symbol carries a subset of antenna ports rather than all ports simultaneously. This approach increases coverage range by ensuring adequate power allocation per antenna port while maintaining a relatively simple transmission structure through systematic port distribution across symbols, thus resolving the contradiction between structural simplicity and coverage range.
3Device complexity
If all antenna ports use equal power allocation on each symbol, then the power distribution is uniform and simple, but the overall transmission power per antenna port is insufficient, affecting uplink and downlink performance
Solution Approach 1:
The patent segments the power allocation across multiple OFDM symbols. Instead of allocating power uniformly across all antenna ports on a single symbol, the total power is distributed across multiple symbols with each antenna port receiving appropriate power allocation on its designated symbols. This segmentation enables sufficient transmission power per antenna port while maintaining simple uniform power distribution within each symbol, resolving the contradiction between power allocation simplicity and transmission power sufficiency.
Data Source
AI summary
Provided in the embodiments of the present application are a transmission method and apparatus. The method includes: resource configuration information of a first sounding reference signal (SRS), which is from a network device, is received; and according to the resource configuration information, antenna ports of a first SRS resource on at least two orthogonal frequency division multiplexing (OFDM) symbols are transmitted. The antenna ports, which are transmitted on the OFDM symbols, are different from each other.