Training Sequence Code Power Allocation for Channel Estimation
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Solution Overview
Problem
Interference between training sequence codes in communication systems deteriorates channel estimation performance, necessitating a method to improve this performance.
Innovation Solution
The method involves allocating time slots for multiple transmitting antennas into frames and transmitting training sequence codes with varying power levels, where one antenna transmits with reference power and others with power from zero to reference power, allowing the receiving apparatus to select the sequence with the greatest reception power for channel estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple transmitting antennas transmit training sequence codes simultaneously, then the channel estimation can be performed for multiple antennas, but mutual interference between training sequence codes deteriorates the channel estimation performance
Solution Approach 1:
The patent applies periodic action by allocating different time slots to different transmitting antennas for training sequence code transmission. Instead of simultaneous transmission, each antenna transmits its training sequence code in a dedicated time slot within a frame structure, creating a periodic transmission pattern that eliminates mutual interference while maintaining the ability to estimate channels for multiple antennas.
Solution Approach 2:
The patent segments the training sequence code transmission by dividing it into separate time slots for different transmitting antennas. Each antenna's training sequence code is transmitted in a distinct time segment rather than simultaneously, allowing the receiving apparatus to process each antenna's signal independently without interference from other antennas.
2Measurement precision
If training sequence codes are transmitted in separate time slots for each antenna, then mutual interference is reduced, but the transmission time and frame structure become more complex
Solution Approach 1:
The patent applies universality by designing a frame structure that can accommodate multiple transmitting antennas using a common template. The frame contains multiple time slots that follow a standardized pattern, allowing the same frame structure to be used for any number of antennas by simply adjusting the number and duration of time slots, rather than creating separate complex structures for each antenna.
3Ease of operation
If training sequence codes are transmitted with equal power, then the transmission is simple, but mutual interference deteriorates the received signal quality
Solution Approach 1:
The patent applies local quality by assigning different power levels to training sequence codes transmitted by different antennas. Specifically, one antenna transmits with reference power while other antennas transmit with reduced power (from zero to reference power). This local differentiation in power allocation improves the received signal quality by reducing interference from non-primary antennas while maintaining transmission simplicity through a standardized power allocation scheme.
Data Source
AI summary
A method and apparatus for transmitting a training sequence code of a transmitting apparatus with a plurality of transmitting antennas in a communication system are provided. A transmitting apparatus allocates a plurality of time slots for the plurality of transmitting antennas to be divided into at least one frame, and sends a training sequence code with reference power for any one of the transmitting antennas, and sends remaining training sequence codes for remainders of the transmitting antennas with transmission power from zero to the reference power, in any one of the time slots. A receiving apparatus receives a plurality of training sequence codes for a plurality of transmitting antennas through any one of the plurality of receiving antennas from a transmitting apparatus, and selects one of the training sequence codes having the greatest reception power to estimate a channel. This may improve a channel estimation performance in a communication system.