700 MHz Interoperability Channel Spacing NCC March 22-23, 2001 Washington, DC

Concern about Interference to I/O channels Shift I/O to center of 25 kHz block 40 dBc 60 dBc 60 dBc 65 dBc 40 dBc 60 dBc 60 dBc 65 dBc ACCP into 6.25 kHz blocks RESERVEI/O RESERVE General UseState Block GUARDGUARD GUARDGUARD 25 kHz = 4 x 6.25 kHz Original FCC Band Plan What NCC wants, based upon 4 th R&O General UseState Block What 4 th R&O gave us 12.5 kHz 700 MHz I/O Channel Shift w/ 4 th R&O Changes I/O 12.5 kHz RESERVE FCC ACCP specifications FCC ACCP specifications

C4FM into adjacent 6.25 kHz Bandwidth

TETRA into adjacent 6.25 kHz Bandwidth

C-QPSK into adjacent 6.25 kHz Bandwidth

Shift I/O to center of 25 kHz block I/OGeneral UseState Block GUARDGUARD GUARDGUARD 6.25 kHz, Separation between blocks General UseState Block 0 kHz, Separation Between blocks 700 MHz I/O Channel Shift I/O 12.5 kHz RESERVE

ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver vs. Spacing between Channel Edges Offending Transmitter Technology

69 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 64 dB Linear 4-slot TDMA (18.75 kHz center to center spacing) 66 dB Linear CQPSK (9.375 kHz center to center spacing) ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver (all exceed FCC ACCP specification of 40 dBc)

69 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 64 dB Linear 4-slot TDMA (18.75 kHz center to center spacing) 66 dB Linear CQPSK (9.375 kHz center to center spacing) ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver (all exceed FCC ACCP specification of 40 dBc) MODULATION RCVR ENBW

GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD 87 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz C4FM I/O 12.5 kHz 65 dB Linear 4-slot TDMA 68 dB Linear CQPSK ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver

GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD 87 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz C4FM I/O 12.5 kHz 65 dB Linear 4-slot TDMA 68 dB Linear CQPSK ACPR from Various Technology Transmitters into Project 25 Phase I (I/O) Receiver MODULATION RCVR ENBW

ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers vs. Spacing between Channel Edges Victim Receiver Technology

71.6 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 71 dB Linear 4-slot TDMA (18 kHz Rcvr BW, kHz center to center spacing) 45.7 dB Linear CQPSK (5.4 kHz Rcvr BW, kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers WORST CASE

71.6 dB I/O 12.5 kHz 700 MHz I/O Channel w/o Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, 12.5 kHz center to center spacing) I/O 12.5 kHz RESERVE 71 dB Linear 4-slot TDMA (18 kHz Rcvr BW, kHz center to center spacing) 45.7 dB Linear CQPSK (5.4 kHz Rcvr BW, kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers WORST CASE MODULATION RCVR ENBW

88.3 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, kHz center to center spacing) I/O 12.5 kHz RESERVE 83.3 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 25 kHz center to center spacing) 83.7 dB Linear CQPSK (5.4 kHz Rcvr BW, kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD I/O 12.5 kHz I/O 12.5 kHz I/O 12.5 kHz MODULATION

88.3 dB I/O 12.5 kHz 700 MHz I/O Channel w/ 6.25 kHz Shift I/O 12.5 kHz RESERVE C4FM (5.4 kHz Rcvr BW, kHz center to center spacing) I/O 12.5 kHz RESERVE 83.3 dB Linear 4-slot TDMA (18 kHz Rcvr BW, 25 kHz center to center spacing) 83.7 dB Linear CQPSK (5.4 kHz Rcvr BW, kHz center to center spacing) ACPR from Project 25 Phase I (I/O) Transmitter into Various Technology Receivers GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD GUARDGUARD I/O 12.5 kHz I/O 12.5 kHz I/O 12.5 kHz MODULATION RCVR ENBW

T R Adjacent Channel User I/O Channel User ‘bigger’ 40 dB ACPR ‘hole’ around I/O user ‘smaller’ 80 dB ACPR ‘hole’ around I/O user Relative Effect of power coupled into Adjacent Channel

+34.8 dBm (3 watts) - ACPR -3 dB portable A antenna - Free Space Loss - 7 dB Clutter -3 dB portable B antenna Interferer A Signal Level into Receiver B