Title :
Exponentially-modulated filter bank-based transmultiplexer
Author :
Alhava, Juuso ; Renfors, Markku
Author_Institution :
Inst. of Commun. Eng., Tampere Univ. of Technol., Finland
Abstract :
A complex filter bank divides the spectrum of a complex (I/Q) signal into several low-rate subbands (analysis bank) or combines the low-rate signals into a single high-rate signal (synthesis bank). These operations are often cascaded to form analysis-synthesis (AS) or transmultiplexer (TMUX) configurations. Such systems find applications in many areas, especially in communications signal processing. In this paper we develop further the lapped transform theory to cover also the cases of complex, exponentially modulated filter banks. Using the shift-orthogonality of lapped transforms, we show how to design complex critically sampled AS and TMUX systems such that the perfect-reconstruction condition is satisfied.
Keywords :
channel bank filters; digital filters; multiplexing equipment; TMUX systems; analysis-synthesis configurations; communications signal processing; complex filter bank; filter bank-based transmultiplexer; high-rate signal; lapped transform theory; low-rate signals; low-rate subbands; perfect-reconstruction condition; shift-orthogonality; Communications technology; Electronic mail; Equations; Filter bank; Passband; Prototypes; Signal analysis; Signal processing; Signal synthesis; Wireless communication;
Conference_Titel :
Circuits and Systems, 2003. ISCAS '03. Proceedings of the 2003 International Symposium on
Print_ISBN :
0-7803-7761-3
DOI :
10.1109/ISCAS.2003.1205816