Request LMDS is a **DS family technology but it uses much higher frequencies - K-band, Ka-band (20 - 40 GHz).
LMDS is a **DS family technology but it uses much higher frequencies - K-band, Ka-band (20 - 40 GHz). It offers much wider frequncy range, which means more TV channels. Also, due to relatively short wavelengths, the physical dimensions of the transmitting/receiving equipment are small. In addition 20 - 40 GHz frequency range usually is unloaded. But it has several disadvantages: expensive, because of the high cost of subscriber receiver; RF equipment is not so widespread and available as lower frequency one. But it useful or even irreplaceable in some situations.
|Parameter||LMDS (K-band, Ka-band)|
|Operation frequency range, GHz||20.0 - 30.0|
|Broadcasting standards||DVB-S/S2 or DVB-T|
|Modulation types||QPSK, 8PSK or COFDM|
|Coverage zone with one transmitter||up to 5km|
|Repeater Hops without regeneration||none|
|Repeater Hops with reregeration||unlimited|
|Cost of user's equipment||Expensive, because of the high cost of subscriber receiver|
|A possible way to receive||collective|
For typical solutions see: MVDS/MITRIS .