Dual-Tone MFSK for Frequency-Hopped Spread-Spectrum Multiple Access Communications

Multiuser detection for frequency-hopped spread spectrum systems with BFSK modulation

AbstmctThis paper proposes new multiuser detectors for frequency-hopped spread spectrum multiple-access (FHSSMA) based on binary frequency shift keying (BFSK) modulation and channelized frequency hopping. With knowledge of hopping sequences and envelopes of active users, the proposed scheme is a sub-optimal detector under maximum likelihood test. Diversity combining is employed as an anti-multi...

Multiple-dwell and sequential code acquisition with diversity for FFH/MFSK spread-spectrum systems under band multitone jamming

Pseudonoise code acquisition is investigated for constant hopping rate fast frequency-hopped (FFH)/M -ary frequency-shift keying systems under the effects of white Gaussian noise and band multitone jamming. In particular, serial search acquisition systems based on the traditional multiple-dwell test (up to three dwells) and three novel sequential tests are analyzed and compared. Analytical resu...

Multiple-access capability of frequency-hopped spread-spectrum revisited: an analysis of the effect of unequal power levels

The probability of error for Frequency Hopping Spread Spectrum in Wireless Communication Using MFSK Modulations

-The paper is focus on the performance of fast frequency hopped spread spectrum by using M-ary frequency shift keying (MFSK) modulations. In fast FH systems, the frequency-hop rate Rh is some multiple of the symbol rate. Basically, each (M-ary) symbol interval is subdivided into N subintervals, which are called chips and one of M frequencies is transmitted in each subinterval. The probability o...

Analysis & Design of a Frequency - Hopped Spread - Spectrum Transceiver for Wireless

Personal Communications Services (PCS) require low-power radio technologies. One such transceiver architecture employing frequency-hopped spread spectrum techniques is described. Low power and robustness are two keys to a wireless personal communications device. A frequency-hopped code-division multiple access (CDMA) scheme is chosen over other multiple access methods because it provides an inh...