Spectrum Efficiency of M-ary PSK Land Mobile Radio
Hiroshi Suzuki, Kenkichi Hirade · IEEE Transactions on Communications · 1982
Spectrum efficiency ofM-ary PSK land-mobile radio is discussed theoretically. The spectrum efficiency ηT(erlangs/Hz·m2) is defined as spatial traffic density per system bandwidth, and is shown to be consistent with the conventional ones. The effect of multilevel modulation upon ηTis calculated. It is shown that ηTis optimal whenM=4, i.e. QPSK.