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# range2bw

Convert range resolution to required bandwidth

## Syntax

``bw = range2bw(rngres)``
``bw = range2bw(rngres,c)``

## Description

example

````bw = range2bw(rngres)` returns the bandwidth needed to distinguish two targets separated by a given range. Such capability is often referred to as range resolution. The propagation is assumed to be two-way, as in a monostatic radar system.```
````bw = range2bw(rngres,c)` specifies the signal propagation speed.```

## Examples

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Assume you have a monostatic radar system that uses a rectangular waveform. Calculate the required pulse bandwidth in MHz of the waveform so that the system can achieve a range resolution of 10 m.

```rngres = 10; c = physconst('LightSpeed'); bw = range2bw(rngres,c)/1e6;```

The required bandwidth is approximately 15 MHz.

## Input Arguments

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Target range resolution in meters, specified as a scalar or a MATLAB array of positive real values.

Data Types: `double`

Signal propagation speed, specified as a positive scalar. Units are in meters per second.

Data Types: `double`

## Output Arguments

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Required bandwidth in hertz, returned as a MATLAB array of positive real values. The dimensions of `bw` are the same as those of `rngres`.

## Tips

• This function assumes two-way propagation. For one-way propagation, you can find the required bandwidth by multiplying the output of this function by 2.

## Algorithms

The function computes `c/(2*rngres)`.

## References

[1] Skolnik, M. Introduction to Radar Systems, 3rd Ed. New York: McGraw-Hill, 2001.

## See Also

### System Objects

#### Introduced in R2012b

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