A technique is given for determining the error-rate performance of a class of digital communication systems operating with fading multipath interference. The approach uses a truncated series to represent the fading process and takes into account the effects of intersymbol interference caused by linear filtering in the receiver or channel. Application of the method to the cases of minimum shift keyed (MSK) and offset quadriphase shift key (OQPSK) systems reveals a slight performance advantage for MSK.

Calculation of error probability for MSK and OQPSK systems operating in a fading multipath environment

An analytical method is presented for the error probability evaluation that can be used in many cases to reduce significantly the computation time with respect to that required by simulation techniques. The method can take into account thermal noise, intersymbol interference caused by intermediate frequency (IF) and baseband (BB) filterings, multipath propagation with typical delay spreads, Rayleigh fading, and random FM noise. A number of results are presented relevant to multipath fading channels with different vehicle speeds, several modulation techniques belonging to the 12PM3 class with frequency discriminator detection and different IF and BB filters. >

An analytical evaluation of bit error probability in mobile radio systems with 12PM3 modulations

The increasing interest in digital land mobile radio has led to the definition of a new class of constant-envelope compact-spectrum modulations called 12PM3. The performance of such a class of modula- tions has to be assessed in the presence of additive Gaussian noise, multipath fading, random FM noise, and adjacent and cochannel interference. An analytical method is presented for the error probability evaluation, which can be used in many cases to reduce significantly the computation time with respect to that required by simulation techniques. This analytical method can take into account thermal noise, intersymbol interference caused by intermediate frequency (IF) and baseband (BB) filterings, multipath propagation with typical delay spreads, Rayleigh fadings, and random FM noise. A number of results are presented relevant to multipath fading channels with different vehicle speeds, several modulation techniques belonging to the 12PM3 class with frequency discriminator detection, and different IF and BB filters.

in Mobile Radio Systems with 12PM3 Modulations

The performance of a noncoherent frequency-shift keyed (FSK) system is analyzed in the presence of multipath fading by using a sinusoidal series expansion technique for the representation of a bandlimited Gasussian process. The probability of error is calculated as a function of the system parameter BT , signal-to-noise ratio, fading bandwidth and direct to reflected signal power ratio.

S. Kwon

Papers

Noncoherent Detection of FSK Signals in the Presence of Multipath Fading