1. Method for channel estimation in a tdma mobile radio telephone system

2. A versatile time division multiple access (TDMA) slot allocation unit (300) is described.

3. In the FDMA and TDMA systems, frequency planning is an important consideration.

4. This means that slotted ALOHA (S-ALOHA) is used for reservation inquiries during a contention phase, and then the actual data is transferred using dynamic TDMA with first-come first-served.

5. A CDM (synchronous CDMA), TDMA, or FDMA receiver can in theory completely reject arbitrarily strong signals using different codes, time slots or frequency channels due to the orthogonality of these systems.

6. The directional radiation characteristic of the aerial system (1) of the fixed station of a mobile radio-telephone system operating with a digital time-multiplex (TDMA) process is matched to the current location of the mobile station which is transmitting or being received at that time.

7. A slope controlled modulation Spread Spectrum TDMA System used in tracking the absolute position of moving targets by radio or other electromagnetic or acoustic radiated energy systems having a master clock (M) transmitting time reference to a network of fixed receivers (RX¿1?, RX¿2?...), a mobile transmitter in a vehicle (V) generating a signal (Tx) with a stimulus preceding the prescribed modulation signal.