Title :
Analysis and design of a frequency-hopped spread-spectrum transceiver for wireless personal communications
Author :
Min, Jonathan S. ; Samueli, Henry
Author_Institution :
Broadcom Corp., Irvine, CA, USA
fDate :
9/1/2000 12:00:00 AM
Abstract :
Personal communications services (PCS) require low-power radio technologies. One such transceiver architecture employing frequency-hopped spread-spectrum techniques is presented. System features such as antenna diversity with equal-gain combining and sequential hop combining are incorporated into the transceiver design to achieve robust wireless digital data transmission over fading channels. A direct-conversion architecture from radio frequency (RF) to baseband reduces the overall power consumption by eliminating intermediate frequency (IF) components. High-rate frequency hopping with frequency-shift keying (FSK) modulation is implemented using a direct digital frequency synthesis technique. A multiplierless correlation FSK detector, suitable for direct-conversion receivers, has been designed for quadrature noncoherent detection. Robust acquisition algorithms based on energy detection and pattern matching and tracking architectures using digital phase-locked loops are also described for system synchronization. The proposed transceiver is well-suited for low-power PCS applications and other portable wireless communications
Keywords :
code division multiple access; correlation methods; data communication; digital phase locked loops; digital radio; direct digital synthesis; diversity reception; frequency hop communication; frequency shift keying; pattern matching; personal communication networks; signal detection; spread spectrum communication; synchronisation; transceivers; DPLL; FH-CDMA; FH-SS transceiver; antenna diversity; baseband; digital phase-locked loops; direct digital frequency synthesis; direct-conversion architecture; direct-conversion receivers; energy detection; equal-gain combining; fading channels; frequency-hopped spread-spectrum transceiver; frequency-shift keying; high-rate frequency hopping; low-power PCS applications; low-power radio technologies; multiplierless correlation FSK detector; pattern matching; personal communications services; portable wireless communications; power consumption reduction; quadrature noncoherent detection; radio frequency; robust acquisition algorithms; sequential hop combining; system synchronization; tracking architectures; transceiver architecture; transceiver design; wireless digital data transmission; wireless personal communications; Data communication; Diversity reception; Frequency shift keying; Frequency synthesizers; Personal communication networks; Radio frequency; Robustness; Spread spectrum communication; Transceivers; Transmitting antennas;
Journal_Title :
Vehicular Technology, IEEE Transactions on
