Single channel TDD Transmitter , Digital Long Range Wireles

Single channel TDD Transmitter , Digital Long Range Wireless Transmitter

Introduction:

Using the TDD method, a single frequency channel is assigned to both the transmitter and the base station. Both the uplink (UL) and downlink (DL) traffic use the same frequency f0 but at different times.

1. Since the TDD scheme can allocate dynamically the amount of time slots assigned to each direction -- transmit and receive-- an operator can define the percentage of UL versus DL traffic. This is especially important for Internet-type traffic (the ratio for UL/DL is no longer constrained to a fixed 50/50).
2. A guard band is not required to separate the UL and DL channels, because they both use the same frequency – hence, there is no loss in spectrum. A guard period, though, is necessary for synchronization purposes and to accommodate the turnaround time and the round trip delay whenever switching transmission from DL to UL, and vice versa.
3. Because the UL/DL allocation is dynamic, there is very little waste of spectrum for asymmetric operations, i.e., last-mile applications, where typically the UL traffic is a fraction of the DL traffic. (Some spectrum is still lost for the guard periods, but this is negligible compared to the total length of data in a time slot).

Product Features:

1. Smart, light and low power consumption
2. Support system with frequency or inter frequency networking, automatic roaming
3. Stable power, adjustable dynamic power
4. NLOS transparent IP data and audio and video transmission
5. Encryption: AES 128 bit
6. Stable power supply for over 5 hours.

Technical Parameters:

Background:

Zhongchuang Tech is specialized in COFDM, TDD and 3G/4G wireless video transmission products for over 9 years, including video wireless transmitter, video wireless transmitter and receiver, quality video wireless transmitter, products are applied widely among Public Security Bureaus, Forest Fire Prevention Departments, Maritime Bureaus, Oil Field, Construction Sites, Tunnels,UAV, Automobiles and so on.