Pre-equalization Reporting for Wireless Interference Cancellation
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Solution Overview
Problem
In wireless communications, pre-equalization techniques are inefficient when a third device receives a signal pre-equalized for a different channel, leading to decreased throughput and increased power consumption due to unnecessary equalization processes.
Innovation Solution
A method where a first device transmits a pre-equalization report to both the intended and potentially unintended receivers, including parameters based on the channel conditions, allowing them to decode the signal and perform interference cancellation efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If pre-equalization is applied to a signal for a specific channel, then the signal decoding accuracy is improved for the intended receiver, but the power consumption and processing complexity increases for unintended receivers who receive the pre-equalized signal as interference
Solution Approach 1:
The transmitting device performs pre-equalization on the signal before transmission, applying channel compensation in advance. This preliminary action prepares the signal for the intended receiver's specific channel conditions, allowing the receiver to decode with higher accuracy while enabling unintended receivers to perform interference cancellation more efficiently by knowing the pre-equalization parameters were applied
Solution Approach 2:
The transmitting device reports the pre-equalization parameters to other devices in the network. This feedback mechanism allows unintended receivers to obtain information about the pre-equalization applied to signals, enabling them to perform interference cancellation procedures that reduce their power consumption and processing burden when receiving pre-equalized signals as interference
2Productivity
If pre-equalization parameters are reported to all receiving devices, then interference cancellation efficiency is improved for unintended receivers, but the communication overhead and system complexity increases
Solution Approach 1:
The pre-equalization parameters act as an intermediary information element that bridges the transmitting device and receiving devices. By reporting these parameters, the system enables receiving devices to perform interference cancellation without requiring complex real-time channel estimation and equalization procedures, thus improving efficiency while managing system complexity through standardized parameter exchange
3Productivity
If pre-equalization is applied based on specific channel conditions, then the throughput for the intended receiver is improved, but the latency increases due to the additional processing required at the transmitter
Solution Approach 1:
The transmitting device performs pre-equalization processing before signal transmission, utilizing previously obtained channel state information. This preliminary action allows the device to compensate for channel effects in advance, improving the intended receiver's throughput while the processing is performed during available time intervals rather than adding critical path latency to the communication
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. A first device (e.g., user equipment (UE), base station) may determine a condition of a channel between the first device and a second device (e.g., UE, base station). The first device may apply pre-equalization to the signal based on one or more pre-equalization parameters. The one or more pre-equalization parameters may be based on the condition of the channel. The first device may transmit, to the second device, or a third device (e.g., UE, base station), or both, a report indicating the one or more pre-equalization parameters associated with the pre-equalized signal. The first device may transmit, to the second device, the pre-equalized signal over the channel. The second device may decode the pre-equalized signal based on the report. The third device may receive the pre-equalized signal and perform interference cancelation procedures to the pre-equalized signal based on the report.