Continuous phase modulation - Wikipedia
WEBContinuous phase modulation (CPM) is a method for modulation of data commonly used in wireless modems. In contrast to other coherent digital phase modulation techniques where the carrier phase abruptly resets to zero at the start of every symbol (e.g. M- PSK), with CPM the carrier phase is modulated in a continuous manner.
WEBIn this paper, PSP is used to provide an approximate MLSE receiver for CPFSK signals. This application of PSP results in a new reduced state sequence estimation algorithm for CPFSK signals as well as an approach to apply MLSE to digital FM signals.
WEBAn algorithm for approximate MLSE detection of CPFSK signals with irrational modu-lation indexes, which is based on Per-Survivor Processing (PSP), has been proposed in [5]. In its original form, PSP is a technique for enabling MLSE using the Viterbi algorithm (VA) in uncertain environments [6].
WEBIn this paper we have described the optimization of a CPFSK-receiver based on a phase reconstruction structure. Combining the phase reconstruction module with a Viterbi detector a performance close to the MLSE-bound can be obtained.
Continuous phase modulation - Wikiwand
WEBThis requires a maximum-likelihood sequence estimator (MLSE), which is efficiently implemented using the Viterbi algorithm. Minimum-shift keying (MSK) is another name for CPM with an excess bandwidth of 1/2 and a linear phase trajectory .
WEBThe optimum decoding of CPM often utilizes a maximum-likelihood sequence estimation (MLSE) by means of the Viterbi algorithm, which is rather complicated in implementation [10]. In the literature, several suboptimal demodulation methods have been proposed to reduce this complexity.
Efficient design of trellis coded CPFSK - IEEE Xplore
WEBDec 5, 1990 · Binary CPFSK with a modulation index of 1/4 and quaternary CPFSK with modulation indices of 1/2 and 1/4 are considered. Combinations are optimized in the Euclidean distance sense for a given total number of states in the overall maximum likelihood sequence estimation (MLSE) receiver.
MacSphere: On trellis coded continuous phase frequency shift keying
WEBRecent work has decomposed CPFSK into two parts; a linear encoder with memory, called the continuous phase encoder (CPE), and a memoryless modulator (MM), where the CPE often has a code structure defined over the ring of integers modulo-P.
Decoding algorithms for continuous phase modulation
WEBThis is called maximum likelihood sequence estimation (MLSE). Another way to do MLSE would be to correlate all possible transmitted sequences (reference signals at the demodulator) over a period of N symbol intervals with the received sequence.
Continuous Phase Frequency Shift Keying (CPFSK)
WEBApr 15, 2003 · Continuous Phase Frequency Shift Keying (CPFSK) is a modulation that, as its name implies, can be characterized as a traditional frequency shift keyed (FSK) signal constrained to maintain continuous phase at its symbol time boundaries.
- Some results have been removed