We study the design of synthesis filters in noisy filter bank systems using an H" point of view. For unitary analysis polyphase matrices we obtain an explicit expression for the minimum achievable disturbance attenuation. Numerical examples and comparisons with existing methods are also included.

Today quadrature signals for IQ demodulation are provided through RC polyphase networks, quadrature oscillators or double frequency VCOs. This paper presents a new method for generating quadrature signals in integrated circuits using only inductors and capacitors. This LC quadrature generation method enables significantly reduced noise and power consumption.

We present a general algorithm for generating arbitrary standard complementary pairs of sequences (including binary, polyphase, M-PSK and QAM) of length 2 using Boolean functions. The algorithm follows our earlier paraunitary algorithm, but does not require matrix multiplications. The algorithm can be easily and efficiently implemented in hardware. As a special case, it reduces to the non-recur...

The fast growth of wireless applications in recent years has driven intense efforts to design highly integrated, high-performance, low-cost RFICs. Both low-IF [33]-[37] and double-quadrature [38]-[40] architectures have been adopted as promising receiver topologies to realize these design goals because they combine the advantages of heterodyne and direct-conversion architectures. In the low-IF ...