Co-channel Interference
Co-channel interference (CCI) exists when two or more devices are operating on the same frequency channel. Co-channel is typically not interference but some kind of congestion. It inhibits the performance by increasing the wait time as the same as channel used by different devices. The Co-channel interference forces other devices to defer transmissions and wait in a queue until the first device finishes using the transmission line and the channel is free.
What You Need To Know About Co-Channel Interference
- Co-channel interference can be described as interference between the signals from co-channel cells.
- Co-channel interference comes from a device using the same channel.
- Co-channel majorly occurs on the same channel.
- A large co-channel reuse ratio improves the transmission quality because of the smaller level of co-channel interference.
- To reduce co-channel interference and provide efficient isolation, Co-channel cells are physically separated by a minimum distance.
Adjacent Channel Interference
Adjacent channel interference (ACI) occurs when transmissions are sent on an adjacent or partially overlapping channel. The channel bleeds over on an overlapping channel, which adds noise and interference.
Majorly adjacent channel interference occurs in a radio channel when unwanted energy from channels adjacent to it falls into its desired bandwidth. The number of adjacent channel interfering cells, however, depends on the channel reuse pattern, channel spacing and signal excess bandwidth.
What You Need To Know About Adjacent Channel Interference
- Adjacent channel interference can be described as the interference that results from the signal that is adjacent in frequency to the required signal.
- Adjacent channel interference comes from channels on nearby frequencies.
- Adjacent channel interference occurs from a different channel.
- Adjacent channel interference can also be caused by frequency reuse and when the frequency reuse is high there are more chances for interference because of operation.
- The adjacent channel interference can be minimized by proper filter and channel assignment strategy.
Also Read:Difference Between Cell Splitting And Cell Sectoring
Difference Between Co-channel Interference And Adjacent Channel Interference In Tabular Form
| BASIS OF COMPARISON | CO-CHANNEL INTERFERENCE | ADJACENT CHANNEL INTERFERENCE |
| Description | Co-channel interference can be described as interference between the signals from co-channel cells. | Adjacent channel interference can be described as the interference that results from the signal that is adjacent in frequency to the required signal. |
| Source | Co-channel interference comes from a device using the same channel. | Adjacent channel interference comes from channels on nearby frequencies. |
| Occurrence | Co-channel majorly occurs on the same channel. | Adjacent channel interference occurs from a different channel. |
| Cause | A large co-channel reuse ratio improves the transmission quality because of the smaller level of co-channel interference. | Adjacent channel interference can also be caused by frequency reuse and when the frequency reuse is high there are more chances for interference because of operation. |
| Minimizing | To reduce co-channel interference and provide efficient isolation, Co-channel cells are physically separated by a minimum distance. | The adjacent channel interference can be minimized by proper filter and channel assignment strategy. |