We examine the design of modulation systems for meteor burst communica
tions, In particular, we present a technique which allows the designer
to determine the signal set size and the signaling rate which maximiz
e the throughput per meteor burst, The technique, which involves the c
apacity and cutoff rate from information theory, is applied to a varia
ble coding rate scheme and a variable signaling rate scheme, for both
coherent MPSK (M = 2, 4, 8) and noncoherent MFSK (M = 2, 4, 8, 16, 32)
, As a fringe benefit, the method proposed also provides estimates on
achievable throughputs.