Abstract: A transmit path correction system (34) for compensating for digital DC offsets, I/Q gain imbalances and I/Q phase imbalances includes a mixed signal forward path (36) and a mixed signal feedback path (38). The forward pat (36), which is operable to process input data symbols to produce at least one analog output signal, preferably includes a digital DC offset correction circuit (86) for compensating for digital DC offsets in the forward path (36) using at least one digital feedback signal (82, 84), an I/Q phase equalization circuit (90) for compensating for the I/Q phase imbalances in the forward path (36), and an I/Q gain equalization circuit (88) for compensating for the I/Q gain imbalances in the forward path (36) using the digital feedback signal(s) (82, 84). The feedback pat (38) processes the analog output of the forward path (36) to produce the digital feedback signal(s) (82, 84).

Abstract: A signal processing apparatus preferably suitable for implementation as an integrated circuit, that is arranged and constructed to be shared for processing a plurality of signals without interference between the signals and method thereof, the signal processing apparatus comprising: an input multiplexer for sequentially selecting from among the plurality of signals to provide a sequence of selected signals; a processing unit for processing the sequence of selected signals to provide a sequence of processed signals, the processing unit having an input coupled to the input multiplexer and a delay stage including a plurality of series coupled delay elements with one delay element corresponding to each of the plurality of signals; and an output de-multiplexer for sequentially selecting from the sequence of processed signals to provide a plurality of processed signals corresponding one to one with the plurality of signals.

Abstract: A signal processing apparatus 200, 800, preferably suitable for implementation as an integrated circuit, that is arranged and constructed to be shared for processing a plurality of signals without interference between the signals and method 1200 thereof, the signal processing apparatus comprising: an input multiplexer 203, 803 for sequentially selecting from among the plurality of signals to provide a sequence of selected signals; a processing unit 205, 805 for processing the sequence of selected signals to provide a sequence of processed signals, the processing unit having an input coupled to the input multiplexer and a delay stage 319, 1111 including a plurality of series coupled delay elements with one delay element corresponding to each of the plurality of signals; and an output de-multiplexer 209, 807 for sequentially selecting from the sequence of processed signals to provide a plurality of processed signals corresponding one to one with the plurality of signals.

Abstract: A null-pilot symbol assisted fast automatic frequency control (AFC) system for coherent demodulation of carrier phase modulation (CPM) includes (209) a pilot clock driven phase differentiator (252,253,255) for operating once every pilot clock cycle to determine the difference between the phase at a current pilot symbol location and the phase at a previous pilot symbol location. A frequency offset selector (256) is then used for choosing the most likely frequency offset from amongst a set of all frequency offsets that give rise to the same phase difference.

Abstract: A transmit path correction system ((34) for compensating for I/Q gain imbalances and I/Q phase imbalances includes a mixed signal feed forward path (36) and a mixed signal feedback path (38). The mixed signal feed forward path (36) includes a digital DC offset correction circuit (86) for compensating for digital DC offsets in the mixed signal feed forward path (36) using a feedback signal (82,84), an I/Q phase equalization circuit (90) for compensating for the I/Q phase imbalances in the mixed signal feed forward path (36), and an I/Q gain equalization circuit (88) for compensating for the I/Q gain imbalances in the mixed signal feed forward path (36) using the feedback signal (82,84). The mixed signal feedback path (38) processes the output of the mixed signal feed forward path (36) to produce the feedback signal (82,84).

Abstract: A null-pilot symbol assisted fast automatic frequency control (AFC) system for coherent demodulation of carrier phase modulation (CPM) includes (209) a pilot clock driven phase differentiator (252,253,255) for operating once every pilot clock cycle to determine the difference between the phase at a current pilot symbol location and the phase at a previous pilot symbol location. A frequency offset selector (256) is then used for choosing the most likely frequency offset from amongst a set of all frequency offsets that give rise to the same phase difference.