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Energy efficient transmitter power control

A power control signal and output power technology, applied in power management, power amplifier, multiple modulation transmitter/receiver layout, etc., can solve the problem of reducing the performance of adjacent communication systems, so as to reduce signal processing and power consumption Effect

Active Publication Date: 2018-01-23
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If microwave radio transmissions are strong enough, this interference can degrade the performance of adjacent communication systems, at least where the spectrum overlaps

Method used

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Examples

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Embodiment Construction

[0027] The present teaching relates to optimization of energy consumption in communication systems, in particular in microwave radio links for data transmission via Adaptive Coding and Modulation (ACM) or Adaptive Coding and Modulation and Baud Rate (ACMB) .

[0028] The main idea of ​​the present disclosure involves adjusting the output power of a power amplifier (PA) for data transmission based on the buffer status of the data buffer. Output power adjustment is done such that the PA output power is reduced when there is only a small amount of data or data with a lower priority level, and the PA output power is increased as the buffer fills up or when the buffer contains high priority data.

[0029] This causes the ACM system to automatically respond to changing power levels by adjusting the spectral efficiency of the data transmission to match the current power level, thereby avoiding transmission errors despite the reduced output power. Due to the control of the output pow...

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Abstract

A microwave transceiver comprising a data buffer, an ACM module, a PA, and an antenna. The ACM module is configured to receive buffered data from the data buffer and to modulate the buffered data at amodulation format having a spectral efficiency, the PA configured to receive modulated buffered data from the ACM module, and to transmit amplified modulated buffered data, via the antenna, to a remote microwave transceiver at an output power. The modulation format is selected from a plurality of modulation formats based on a feedback signal from the remote microwave transceiver. The microwave transceiver further comprises a control module configured to monitor a buffer state of the data buffer, and to control the output power of the PA based on the buffer state.

Description

technical field [0001] The present disclosure relates to wireless communication systems, and more particularly to transmitter power control for point-to-point microwave radio links implementing Adaptive Coding and Modulation (ACM). Background technique [0002] A microwave radio link or radio link system is a communication system that transmits data between two fixed locations via a point-to-point link. A microwave radio link transmitter and receiver are usually included in one unit, denoted here as a microwave transceiver. [0003] Radio transmissions such as microwave radio transmissions often interfere with adjacent communication systems. If microwave radio transmissions are strong enough, this interference can degrade the performance of adjacent communication systems, at least where the spectrum overlaps. Therefore, it is desirable to reduce radio interference in wireless communication systems. [0004] Power consumption is a significant contributor to the cost of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/34H04W52/38H03F3/24H04W52/26H04W52/28
CPCH04W52/262H04W52/281H04W52/343H04W52/383H03F3/24H04B1/40H04L27/0008H04L1/0003H04B2001/0416H04B2001/0408H04L1/0009H04L1/0026
Inventor 菲利浦·赫尔格伦博扬·加维特
Owner TELEFON AB LM ERICSSON (PUBL)
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