In this configuration, the antenna arrays at the BS are distributed, and each antenna uses a separate local oscillator
, that is, [N.sub.0] = M.This is known as non-synchronous operation at the base station, and the base station antennas have independent phase noise processes for all m = 1,...,M [20, 27].
An intensity modulation can be organized into different classes based on interconnection, optical principle and via local oscillator
According to statistical maintenance data, main faults of superheterodyne receivers include amplifier faults, local oscillator
faults, and filter faults.
In this paper, we have used the concept of a local local oscillator
The ring VCO of local oscillator
will be used in the RF transceiver of active transponders.
This paper talks about a design of high efficiency systems to drive local oscillator
signal into I/Q differential transceiver.
The internal frequency-synthesized local oscillator
can be locked to an external 10 MHz reference signal for precise tuning accuracy.
With a single transistor, the HSOM works as a mixer with positive conversion gain and generates the local oscillator
The VSA consists of the new NI PXIe-5605 downconverter, the NI PXIe-5653 local oscillator
synthesizer and the NI PXIe-5622, a 150 MS/s intermediate frequency (IF) digitizer.
When used in the receiver section it can be configured to offer a dedicated LO (Local Oscillator
) frequency generator for each antenna path, or can be used in a more traditional antenna-diversity scheme.
It contains more than 150 optical components-such as frequency tunable local oscillator
(LO) lasers, devices for mixing the LO and incoming signals, variable optical attenuators for LO power control, a spectral demultiplexer to separate the individual wavelength channels, and 40 balanced photodetector (receiver/transmitter) pairs-all integrated onto a chip.
The mixer stage mixes a local oscillator
frequency that brings the interested frequency into the