Digital orthogonal transformation technology based on polyphase filtering in software radio
Xing Chen · Electronic Design Engineering · 2010
According to the shortcomings in traditional digital orthogonal transformation such as digital low-pass filter becomes a bottleneck for higher A/D sampling rate,large amount of computing data,needing for quadrature local oscillation and so on,digital orthogonal transformation technology based on polyphase filtering in software radio is introduced.Firstly,it gave an analysis of the principle of digital orthogonal transformation based on polyphase filtering and put forward a new implementation model,then two delay filters which due to even-odd extraction through by one polyphase filter were designed,finally modeling and simulation in MATLAB/SIMULINK were realized.The experimental results show that the design of orthogonal transformation in this way meets the requirements.