What is a $BT$ (Bandwidth-Time) product with reference to modulation?

1. What is BT modulation?
2. What is the time bandwidth product?
3. What is BT in GMSK?
4. What is BT in GFSK?

What is BT modulation?

The BT product is the bandwidth-symbol time product where B is the −3 dB(half-power) bandwidth of the pulse/filter and T is the symbol duration. For different applications you will find varying recommended values.

What is the time bandwidth product?

Time-bandwidth product is the product of the duration of a signal and its spectral width. Generally, signals of short duration have wide spectral width and vice versa. The time- bandwidth product for actual signals will vary but there will always be a minimum time- bandwidth product for a certain desired effect.

What is BT in GMSK?

As a very bandwidth-efficient modulation format, Gaussian minimum shift keying (GMSK) with a low bandwidth-time (BT) product value is important for bandwidth-limited satellite communications.

What is BT in GFSK?

GFSK modulation is determined by two parameters: the modulation index (h) and the bandwidth of the Gaussian filter. The Gaussian filter is usually characterized by the bandwidth-time product (BT), which is equal to the 3-db bandwidth of the Gaussian filter (B) times the bit period (T).