MIMO Beamforming Weight Calculation via Channel Feedback
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Solution Overview
Problem
Existing MIMO beam forming technologies face challenges in accurately and timely obtaining weight values for efficient data transmission, which affects system performance and coverage.
Innovation Solution
A method and device for transmitting MIMO beam forming data that involves performing MIMO coding on data streams, obtaining weight values based on channel information from the transmitting end to the receiving end, and weighting the coded data streams for beam forming, where the data transmitted by each antenna is a superposition of the coded data streams weighted by the obtained weight values.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MIMO beam forming is implemented, then system performance and coverage are enhanced, but accurate and timely acquisition of weight values becomes challenging
Solution Approach 1:
The patent applies preliminary action by performing channel estimation and calculating optimal weight values in advance before actual data transmission. The base station pre-processes channel state information to determine beam forming weights, ensuring that accurate weight values are ready when needed for transmission, thus resolving the timing and accuracy challenges in weight value acquisition
Solution Approach 2:
The patent implements feedback mechanisms where the base station continuously acquires channel state information from the wireless channel and uses this feedback to dynamically adjust and recalculate weight values. This closed-loop feedback ensures that weight values remain accurate and up-to-date with current channel conditions, addressing the challenge of maintaining precision in weight value acquisition
2Productivity
If MIMO coding is combined with beam forming, then data transmission efficiency is improved, but the complexity of obtaining and applying weight values increases
Solution Approach 1:
The patent merges MIMO coding operations with beam forming weight application into a unified processing framework. By integrating these functions, the system achieves improved data transmission efficiency while managing complexity through combined processing rather than separate sequential operations, directly addressing the productivity improvement while controlling complexity
Solution Approach 2:
The patent creates a universal weight value calculation mechanism that serves multiple functions: it supports both spatial diversity and spatial multiplexing modes, works with different antenna configurations, and adapts to various channel conditions. This multi-functional approach improves overall system productivity while avoiding the need for separate complex processing paths for different scenarios
Data Source
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AI summary
A Multiple Input Multiple Output (MIMO) and beam-forming data transmission method and device are provided in the invention. The method includes a MIMO coding step for MIMO coding data streams to obtain coded data streams; a weight value estimating step for obtaining weight values W=(Wi,j)Tx*s of Tx*S dimension of antenna arrays of a transmitting end for beam-forming according to channel information from the antenna array of the transmitting end to the antenna of the receiving end, wherein, Tx is number of the transmitting antennas of the transmitting end, and S is number of the data streams which are MIMO coded, S≤Tx; a beam-forming step for weighting the coded data streams using the weight values W=(Wi,j)Tx*s for beam-forming and for transmitting the weighted data streams via corresponding antennas, wherein, the data transmitted via antenna i is overlapped data ∑j=1SWi,jxj, i=1, ..., Tx, j=1, ..., S, xj is jth coded data stream.