Open AccessRF Band‐Pass Sampling Frontend for Multiband Access CR/SDR Receiver
Author(s) -
Kim HyungJung,
Kim Jinup,
Kim JaeHyung,
Wang gmei,
Lee InSung
Publication year - 2010
Publication title -
etri journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 46
eISSN - 2233-7326
pISSN - 1225-6463
DOI - 10.4218/etrij.10.1409.0073
Subject(s) - software defined radio , radio frequency , cognitive radio , electronic engineering , radio receiver design , rf front end , computer science , digital radio , digital down converter , sampling (signal processing) , intermediate frequency , digital signal processing , filter (signal processing) , electrical engineering , engineering , digital signal , telecommunications , wireless , transmitter , channel (broadcasting)
Radio frequency (RF) subsampling can be used by radio receivers to directly down‐convert and digitize RF signals. A goal of a cognitive radio/software defined ratio (CR/SDR) receiver design is to place the analog‐to‐digital converter (ADC) as near the antenna as possible. Based on this, a band‐pass sampling (BPS) frontend for CR/SDR is proposed and verified. We present a receiver architecture based second‐order BPS and signal processing techniques for a digital RF frontend. This paper is focused on the benefits of the second‐order BPS architecture in spectrum sensing over a wide frequency band range and in multiband receiving without modification of the RF hardware. Methods to manipulate the spectra are described, and reconstruction filter designs are provided. On the basis of this concept, second‐order BPS frontends for CR/SDR systems are designed and verified using a hardware platform.