Digital TDD-OFDM Portable Base Station for Wireless Communication

Brand Name	LinkAV		Place of Origin	China
Model Number	TJ340-700-5W

Delivery Time:20 Days
Certification:CE Applicable

5W?TJ340-700 Portable Base Station for Wireless Communication

Introduction:

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

In effect, TDD divides the data stream into frames and, within each frame, assigns different time slots to the forward and reverse transmissions. This allows both types of transmissions to share the same transmission medium (i.e., the same radio frequency), while using only the part of the bandwidth required by each type of traffic.

Several inferences can be drawn from this description:

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). 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. 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:

Inserted modular functionalized, data transmission and display integration Stable power and adjustable dynamic power Support 8 channel video decoding, built-in soft matrix, data storage Single carrier frequency support up to 4 simultaneous users two-way data transmission Encryption: AES 128 bit, flexible power supply Built-in microphone for phone talk and PTZ control.

Technical?Parameters:

Item	TJ340-700-5W
RF Parameter	Working Frequency?	700MHz	?
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Modulation Bandwidth	2 / 4 / 8MHz
Modulation Type	TDD-OFDM
Communication Mode	TDMA Full Duplex
Power Output	37dBm
Band Flatness	≤ ±0.5dB
Spurious Spectrum	≤ -36dBm
Third-order IMD	≤ -36dBC
Receiving Sensitivity	≤ -100dBm
MER	≥ 36dB
Anti-adjacent Frequency Interfere	≥ 40dB
Data	Synchronization Control	GPS/Beidou with Synchronized clock
Transmission Bandwidth	Up to 14Mbps
Network Protocol	IP/TCP,UDP,HTTP,SMTP etc
Business Unit	Video Decoder	8-channel D1 or 4-channel 720p video decoding(similar to Matrix)	?
Display	14 inches HD display
Voice Communication	Built-in amplifier speakers ,sound pick-up ( more than 10 meters )
Data Storage	1T HDD
Generic Specification	Working Temperature	-30 ~ +70°C
Working Voltage	DC12V Battery (work for 3 hours)
Power Consumption	15~30W