US 7,616,720 B2
Multirate digital transceiver
Adnan Al-Adnani, London (United Kingdom)
Assigned to Panasonic Corporation, Osaka (Japan)
Appl. No. 10/495,307
PCT Filed Nov. 29, 2002, PCT No. PCT/GB02/05376
§ 371(c)(1), (2), (4) Date May 12, 2004,
PCT Pub. No. WO03/049395, PCT Pub. Date Jun. 12, 2003.
Claims priority of application No. 0129114.5 (GB), filed on Dec. 05, 2001.
Prior Publication US 2005/0031046 A1, Feb. 10, 2005
Int. Cl. H04B 1/10 (2006.01)
U.S. Cl. 375—350  [375/340; 375/324; 375/316] 24 Claims
OG exemplary drawing
 
1. A method of processing a digital signal obtained by sampling a wideband of carrier frequencies at a rate Fs, in order to obtain information from a desired channel of carrier frequencies within said wideband, said method comprising:
(a) converting the sampled input signal into M subsignals, where M is an integer greater than 1, each subsignal having a sample rate equal to Fs/M;
(b) applying the subsignals to an M-channel bank of band pass filters each having a different pass band within said wideband;
(c) selecting the output from the one of said filters containing said desired channel of carrier frequencies; and
(d) repeating steps a), b) and c) using as the input the output selected at step c) until the next repetition would exclude carrier frequencies of said desired channel from said output.