Phase discontinuity tester for multi antenna transmitters sending phase perturbed signals

Abstract

A tester for determining phase discontinuity is described for a transmitter having multiple antennas sending signals to a receiver. Typically the transmitter is provided in a mobile telephone and the receiver is in a base station. The transmitter sends out the RF signals in a shaped beam using transmission diversity. The RF signals define multiplexing slots. The tester receives the RF signals as they are fed to a respective antenna port, analyses phases of these signals on a slot-by-slot basis comparing phase differences between adjacent slots to a threshold derived from legacy devices.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 61 / 597,015, filed February 9, 2012, which is hereby incorporated by reference in its entirety. technical field [0003] The present disclosure relates generally to the field of wireless communications and more particularly to a tester for detecting phase discontinuities in phase perturbation signals from multi-antenna transmitters. Background technique [0004] A modifying communication device, such as a user equipment UE, has a transmitter comprising a plurality of antenna elements that transmit signals for conveying information. A receiving communication device (typically located at a base station) extracts information from the transmitted signal. Multiple antenna elements enhance spectral efficiency, allowing more users to be served simultaneously on a given frequency band. However, the transmit signal travels along a different path and may...

AI Technical Summary

Problems solved by technology

In reality, however, the net phase discontinuity of the two signals sensed at the receiver is often non-zero due to various effects occurring in the transmitter, and the user equipment must perform test

Images