1 TETRA Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR enhanced data GoTa service Delay spread Class A 50 Class A no Class A no A 39.8 No equalization Class A 52 Class A no Use of – – – – – – equalization Class 50 equalization equalization without equalizer needed Class Q 52 equalization See channels See – – capability (s)(6) Class B 55.5 Class B no Class B 65.5 Class B no specifications eliminates the specifications – – – – Class Q 111.1 equalization without equalizer equalization need for – Class Q N/A Class Q N/A Class Q no equalization in – – – equalization QAM channels. PSK channels same as TETRA1 Channel coding Integrated voice Convolutional Multirate trellis Multirate trellis Convolutional Control Variable rate Convolutional PCCC turbo Convolution and data for codes with coding with coding with codes with BCH/repeat. convolutional with codes for the codes and Turbo FDMA. interleaving plus interleaving plus interleaving plus interleaving plus Digital voice with long interleaving. payload. codes with BCH code for error detection error detection detection error detection custom with interleaving, Turbo codes Partitioned interleaving. network ID. and bit and bit repeat. selective priority block Trellis codes for Prioritization/ prioritization Data repeat protection for codes for the data. convolutional encoded bits, header Golay & codes with partial repetition, Hamming codes interleaving plus and channel state for voice. error detection enhanced Viterbi Reed-Solomon algorithm; error codes for detection (cyclic embedded redundancy signals. check (CRC)) Integrated voice and data for TDMA. TBD for network ID. TBD for data. TBD codes for voice. TBD codes for embedded signals
1 Parameter Project 25 TETRA1 IDRA DIMRS TETRAPOL EDACS FHMA CDMA-PAMR TETRA enhanced data service GoTa Delay spread equalization capability (s)(6) Class A – 50 Class – 50 Class A – no equalization Class B – 55.5 Class Q – 111.1 Class A – no equalization Class B – no equalization Class Q – N/A A – 39.8 without equalizer Class B – 65.5 without equalizer Class Q – N/A No equalization needed Class A – 52 Class Q – 52 Class A – no equalization Class B – no equalization Class Q – no equalization See specifications Use of channels eliminates the need for equalization in QAM channels. PSK channels same as TETRA1 See specifications Channel coding Integrated voice and data for FDMA. BCH code for network ID. Trellis codes for data. Golay & Hamming codes for voice. Reed-Solomon codes for embedded signals. Integrated voice and data for TDMA. TBD for network ID. TBD for data. TBD codes for voice. TBD codes for embedded signals Convolutional codes with interleaving plus error detection Multirate trellis coding with interleaving plus error detection and bit Prioritization/ convolutional codes with interleaving plus error detection Multirate trellis coding with interleaving plus detection and bit prioritization Convolutional codes with interleaving plus error detection Control BCH/repeat. Digital voice custom with repeat. Data repeat Variable rate convolutional with long interleaving, selective priority protection for encoded bits, partial repetition, and channel state enhanced Viterbi algorithm; error detection (cyclic redundancy check (CRC)) Convolutional with interleaving. Turbo codes PCCC turbo codes for the payload. Partitioned block codes for the header Convolution codes and Turbo codes with interleaving.