Spatial Filtering with a multibeam receiver.

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Presentation transcript:

Spatial Filtering with a multibeam receiver. Radio frequency interference removal through the application of spatial filtering techniques on the Parkes Multibeam receiver. Jonathon Kocz Swinburne University of Technology

Spatial Filtering

Parkes Multibeam Experiment

Results 8MHz bandwidth, 32kHz channels

Results 8MHz bandwidth, 32kHz channels

Results 8MHz bandwidth, 32kHz channels

Vela 8MHz bandwidth, 16kHz channels

Problems! Interference Free Before Subtraction After Subtraction (One timestep = 1ms)

Vela - Polarized Interference Free (SNR: 28.91) Before Subtraction After Subtraction (SNR: 16.54) (One timestep = 1ms)

Risks! Interference Free (SNR: 28.91) Interference free, after subtraction (One timestep = 1ms)

Vela - Polarized Interference Free (SNR: 28.91) Before Subtraction After Subtraction (SNR: 20.86) (One timestep = 1ms)

Limitations and moving forward AGC – Need new data path BPSR & CASPSR Data rate – Only process subsets?

Conclusions Spatial filtering with a multibeam receiver is highly effective. SNR recovered to 70% of the interference free case. New system: larger bandwidth, digital data path (no AGC!), real-time processing.