The Martin Company's Adaptive RADA System

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The Martin Company's Adaptive RADA System

The Martin Company's Adaptive RADA System

by:
jtracy
July 16, 2014

Martin Marietta technical advertisement featuring the Martin Company's Adaptive RADA System.

Excerpt:

One key achievement of Martin Company's Adaptive RADA system: the elimination of mulitpath and backscatter effects which degrade system capacity, distort message transmission in most coded pulse systems.

The secret: a concept which combines the best features of exclusive, adaptive and co-channel signaling techniques. The result: a random access, discrete address system which provides highest subscriber capacity with maximum frequency conservation.

Here's how Martin's Adaptive RADA system works:

1. When one subscriber dials another, the signal is sent by co-channel technique which activates the addressee's discrete address code.

2. When contact is established, Martin's adaptive RADA system automatically assigns the subscribers to a channel not in use.

3. Since Martin's adaptive RADA system selects only channels not in use, all other conversations are excluded from this channel-preventing degradation of voice quality due to multipath.

4. Once the conversation is completed, the channel is automatically freed for other subscribers' use.

Other features of Martin's Adaptive RADA system include:

1. CO-EXISTENCE WITH CONVENTIONAL UHF/VHF COMMUNICATIONS EQUIPMENT- since the adaptive system uses narrow channel signals, they can be more easily assigned to avoid interference with other users, and in case of conflict, the system will automatically "skip" the occupied channel.

2. AUTOMATIC POWER AND LEVEL CONTROL-automatically adjusts transmitter and receiver power to the optimum power necessary to complete the radio link. Thus the same adaptive channel may be used and re-used outside the call's transmission area.

3. AUTOMATIC SEQUENTIAL SEARCH-Martin's range extension transmitters automatically search out and locate any address-lets you dial any subscriber direct, whatever his location, without needing to know his "area code". Overlapping coverage of these range extension transmitters also provides alternate routing whether users are stationary or mobile-increases survivability and reliability of the system.

Martin's Adaptive RADA system has been tested and optimized by computer simulation, laboratory experiment and field testing.

It is another example of how Martin Company's new approach to old communications problems is producing better electronic systems for our country's defense.

Advertisement courtesy of the Robert Buck Archives.

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