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1. (WO2017031754) METHOD AND DUAL BAND RADIO RECEIVER FOR HANDLING ANALOG DUAL BAND RADIO SIGNAL

Pub. No.:    WO/2017/031754    International Application No.:    PCT/CN2015/088260
Publication Date: Fri Mar 03 00:59:59 CET 2017 International Filing Date: Fri Aug 28 01:59:59 CEST 2015
IPC: H04B 1/06
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
LI, Ming
Inventors: LI, Ming
SU, Youping
Title: METHOD AND DUAL BAND RADIO RECEIVER FOR HANDLING ANALOG DUAL BAND RADIO SIGNAL
Abstract:
The present disclosure provides a method and a dual band receiver for handling an analog dual band radio signal comprising a first frequency band component and a second frequency band component. The method comprises sampling the analog dual band radio signal through the use of interleaving analog-to-digital converters, ADCs, to obtain four sampled signals including a first I component, Iin +, a first Q component, Qin +, a second I component, Iin -, and a second Q component, Qin -, wherein phases of Qin +, Iin - and Qin - are respectively offset with respect to phases of Iin +, Qin + and Iin - by π/2. Then, the four sampled signals are filtered through the use of polyphase filters to obtain a first set of filtered signals (a1, a2, a3, a4) each of which has a same power as the first frequency band component and a second set of filtered signals (b1, b2, b3, b4) each of which has a same power as the second frequency band component. Subsequently, a power of the first frequency band component, a power of the second frequency band component and a total power of the first frequency band component and the second frequency band component are estimated, based on the four sampled signals, the first set of filtered signals and the second set of filtered signals. Next, the first frequency band component and the second frequency band component are selectively attenuated based on the estimated powers.