Weighting filter, and corresponding methods and devices for transmitting and receiving an analog signal and computer program

Abstract

The invention relates to a weighting filter to be used in a device for transmitting and / or receiving an analog signal, capable of transmitting and / or receiving said analog signal in a predetermined frequency band consisting of two adjacent sub-bands, referred to as first and second sub-bands. According to the invention, such a weighting filter includes: a first arm (41) including a means for attenuating said analog signal; a second arm (42) including a means for filtering said analog signal, said filtering means having a bandwidth corresponding to said first sub-band or to said second sub-band; and a means (43) for combining signals from said first and second arms.

Description

1. Technical field [0001] The field of the invention relates to the field of analog transmission in communication systems. [0002] In particular, the invention relates to the input analog interfaces of transmitters and / or receivers known as "analog front-end transceivers" (AFEs) in communication systems, and more precisely to filters for such interfaces. [0003] The invention may be particularly applicable in the field of power line communications (PLC), especially for transmitting signals in a widened frequency band (of the order of about 0 to 500 MHz). 2. Background technology [0004] 2.1 Power line communication transmission [0005] In the HomePlug AV specification or by Stefano Galli and Oleg Logvinov in IEEE Communications Magazine, July 2008 The power line communication technology defined in the document "Recent Developments in the Standardization of Power Line Communications within the IEEE" enables the creation of local area networks operating at high bit rates...

AI Technical Summary

Problems solved by technology

[0038] However, this technique, which mainly consists in duplicating the AFE system, has several disadvantages

[0039] A first disadvantage of this technique is the complexity required to simultaneously transmit data on both the first and second bands, since each of the two bands requires its own AFE system and fully or to a large extent Digital processing operations on different physical layers

[0040] Another disadvantage of this technique is its cost in terms of resources due to the duplication of most of the modules

[0041] A further disadvantage of this technique is the difficulty of manufacturing analog transmit filters for the first frequency band and receive filters for the second frequency band, since these filters must be highly selective

[0044] Therefore, despite this replication of the AFE system, certain conditions regarding analog filtering remain difficult to comply with

Images