adjacent-channel interference


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adjacent-channel interference

[ə′jās·ənt ′chan·əl in·tər′fir·əns]
(communications)
Interference that is caused by a transmitter operating in an adjacent channel.
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The FCC was probing allegations that its routers were not in "full compliance" with FCC regulations on power levels that prevent against adjacent-channel interference.
The investigation aimed to evaluate performance of three different commercially available DVB-T receivers in the presence from strong adjacent-channel interference of downlink LTE Frequency division duplex signal.
For links within interference range, the co-channel interference occurs from transmissions on the same channel, whereas the adjacent-channel interference occurs from transmissions on adjacent and overlapping channels.
The techniques and hardware described are also applicable to sonar applications and adaptive digital filtering, which could reduce adjacent-channel interference in communications systems, enabling increased use of the frequency spectrum.
The system performances are linked to adjacent-channel interference ratio (ACIR) values.
But FDM is risky for multipoint, multiport applications because of its susceptibility to adjacent-channel interference when line conditions are less than ideal.
Examining all traffic to identify both co-channel and adjacent-channel interference
Other design constraints are the result of regulatory bodies, which specify power spectral density masks defining the maximum allowable adjacent-channel interference (ACI) levels.
In today's wireless networks, where protocols such as GSM, GPRS and Edge are prone to interference, precise identification of co-channel and adjacent-channel interference is crucial in cell and frequency planning and network optimization.
The main objectives of any smart antenna system are reduction of ISI, removal of CCI, mitigation of adjacent-channel interference, enhancement of spectrum efficiency, improvement of BER, reduction of outage probability, improvement of transmission efficiency and reduction of hand-off rate and crosstalk.
This lab-based test solution quickly and accurately tests the receiver performance of W-CDMA terminal and base station receivers in the presence of co- and adjacent-channel interference.
By integrating all the components necessary for generating accurate co- and adjacent-channel interference conditions, the emulator provides a single instrument solution to a problem that previously required more than three instruments.