, hop time intervals are generally much larger than the chip time intervals in DS/BPSK waveforms. Thus we can have some networks with radios transmitting FH/MFSK waveforms where the hopping is synchronized. Multiple Access 2.4.1 Point-to-Point Consider here the performance of point-to-point communication between two radios using FH/MFSK waveforms in a network of other similar radios. Between the transmitter and receiver assume ideal synchronization where the receiver knows the frequency pattern and hop time epoch of the desired FH/MFSK signal. As usual non-coherent detectors are used. Throughout this discussion the other users may or may not have synchro- nized hop times. All hopping patterns are assumed to be independent when different keys are used and each hopping pattern is modelled as a sequence of i.i.d. random frequency variables uniformly distributed over some uni- formly spaced set of points across the spread-spectrum frequency band. This is the SSMA system as opposed to a CDMA system where specific hop- ping patterns with low mutual interference is used [77]-[82] primarily for multiple access applications. In military networks the primary requirements are to use waveforms with anti-jam (AJ) and low probability of intercept (LPI) capabilities. Suppose the point-to-point link using an FH/MFSK waveform has inter- ference in the radio channel due to L other radio transmitters of power dis- tribution given by (2.1) at the radio receiver in question while the intended signal has power S. The L interfering signals appear as multiple tones of dif- ferent powers randomly hopping across the band much like a multitone jam- mer. We now upper bound the bit error probability by assuming that a multitone jammer has the same power J given by (2.4) and uses this in a worst case multitone strategy. Generally, this means the jammer would take equal size tones and distribute them according to some strategy as discussed in Section 2.2, Chapter 2, Part 2. With the worst case multitone jammer the effective bit energy-to-noise