Design of a Frequency Hopping Spread Spectrum Transceiver for Cdma2000 Systems
نویسندگان
چکیده
This paper presents an integrated frequency hopped transceiver based on a subset of the cdma2000 network specifications. The circuit consists of a phase locked loop (PLL) that generates the hopping carriers, local oscillators (LOs) that generate GHz range carrier frequencies, and a series of mixers. It accepts input data in frequency shift keyed (FSK) format, and also outputs received data in FSK format.
منابع مشابه
26.6 a 2.4ghz 34mw Cmos Transceiver for Frequency- Hopping and Direct-sequence Applications
The proliferation of 2.4GHz wireless tandards uch as Bluetooth and IEEES02.llb makes it desirable to realize lowpower, compact transceivers capable of interoperability between frequency-hopping and direct-sequence systems. While Bluetooth requirements for receiver sensitivity and phase noise and transmitter linearity are relatively relaxed, those of IEEE802.11b are much more stringent...
متن کاملAn Interpolated Frequency-Hopping Spread-Spectrum Transceiver
A technique of spread-spectrum transmission, interpolated frequency-hopping (IFH), is presented. IFH employs a carrier that moves smoothly and continuously in frequency, helping to alleviate problems, such as spectral splatter and transient mismatch, which are a concern in conventional phase-locked loop (PLL)-based frequency-hopping spread-spectrum systems. In IFH, the pseudorandom hopping code...
متن کاملAnalysis and design of a frequency-hopped spread-spectrum transceiver for wireless personal communications
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...
متن کاملFPGA-Based Implementation of a Hybrid DS/FFH Spread-Spectrum Transceiver
In recent years there has been great interest in using hybrid spread-spectrum (HSS) techniques for commercial applications, particularly in the Smart Grid, in addition to their inherent uses in military communications. This is because HSS can accommodate high data rates with high link integrity, even in the presence of significant multipath effects and interfering signals. A highly useful form ...
متن کاملImplementation of a Fast Frequency Hopping Spread Spectrum modulator with System Generator on a FPGA
This work is based on a previous FFHSS (Fast Frequency Hopping Spread Spectrum) transceiver designed for wireless optical communications. The core of the transmitter is a discrete DDS (Direct Digital Synthesizer). In the first prototype the DDS control and the digital synchronization signal were generated using a PLD (Programmable Logic Device), besides a discrete external filter was necessary ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2007