Receiver¶

The receiver asset represents an RF receive chain. It links to an antenna and defines receive frequency behaviour, bandwidth, noise figure, and optional system temperature.

Role in ASTROLAB¶

Workflow	Receiver role
Link budget	Provides bandwidth, noise figure, system temperature, and receiver G/T.
RF chain resolution	Links receive calculations to an antenna.
Tracking	Can track transmitter frequency directly or with an offset.

Receiver Chain¶

flowchart LR
    A["Linked Antenna"] --> RX["Receiver"]
    RX --> F["Frequency mode"]
    RX --> B["Bandwidth"]
    RX --> N["Noise model"]
    N --> GT["G/T"]

Main Parameters¶

Field	Meaning
`antenna_guid`	Antenna used by the receiver.
`tracking_transmitter_guid`	Optional transmitter followed by the receiver.
`receiver_type`	`Simple` or `Complex`.
`parameters`	Schema-driven RF receive parameters.

Frequency Modes¶

Mode	Behaviour
`fixed`	Uses the receiver's own frequency.
`track_transmitter`	Uses the linked transmitter frequency.
`track_with_offset`	Uses transmitter frequency plus offset.

Main RF Parameters¶

Parameter	Meaning
`frequency`	Fixed receiver frequency.
`frequency_offset`	Offset used in tracking mode.
`bandwidth`	Receiver noise bandwidth.
`noise_figure`	Receiver noise figure in dB.
`system_temperature`	Optional system temperature in K.
`additional_loss_dB`	Extra receive-side loss.
`data_rate`	Data rate for complex receiver type.

Interpretation¶

Receiver parameters directly affect C/N0, Eb/N0, and margin. Bandwidth and system temperature are especially important; unrealistic defaults can make a link appear much better or worse than intended.