A design of IFIR prototype filter for Cosine Modulated Filterbank and Transmultiplexer

A prototype filter design for cosine modulated transmultiplexer using weighted constrained least squares technique

“…[3] is minimized for optimizing prototype filter coefficient by adjusting the cut-off frequency (ω c ). ICI is taken as an objective function, and it is computationally efficient.…”

“…Further improvement was carried out in [22][23][24][25][26][27][28]. Since then, a number of researchers [3,12] have used these approaches for designing CM TMUX. The authors in [29,30] have used different window functions for the design of TMUX.…”

“…The main advantage of configuring Transmultiplexer is to improve bandwidth efficiency which is achieved by using the full channel bandwidth, thereby leaving no gaps in the frequency bands allocated to the input signals. A detailed discussion of multirate systems is given in [3][4][5][6][7][8][9].…”

“…Multirate FBs are collection of filters, which wrap a band into the frequency spectrum [1,2]. The potential components of FBs are comprised of down sampler, up sampler along with delay elements, and can be drive into two approaches, known as analysis/synthesis mode and synthesis/analysis mode [1,3]. First case corresponds to filter banks, where the number of bits to be transferred through channel or to be stored in the memory desired is significantly reduced with the aid of a proper coding technique, and separation of the signal into different bands is called as sub band coding [1].…”

“…It is derived by changing the roles of analysis and synthesis filters in FBs. Transmultiplexer systems are often used in channel coding application in communication such as Code division multiple access (CDMA), frequency division multiple access (FDMA), and time division multiple access (TDMA) [1][2][3][4] while filter banks are typically used for source coding applications such as data compression [4][5][6][7][8][9]. The main advantage of configuring Transmultiplexer is to improve bandwidth efficiency which is achieved by using the full channel bandwidth, thereby leaving no gaps in the frequency bands allocated to the input signals.…”