design and development of a secure wireless ... - ePrints@USM

LIST OF FIGURES
Page
3.1 Block diagram of the wireless system 36
3.2 Flowchart ShockBurst transmit of nRF24E1 system 38
3.3 Flowchart ShockBurst receive of nRF24E1 system 39
3.4 Packet format 40
3.5 Flowchart for UART transmission 42
3.6 Flowchart for UART reception 43
3.7 Flowchart of packets transmission 45
3.8 Flowchart of packets reception 47
3.9 Data packet 48
3.10 Block diagram of FHSS with PN code generator 49
3.11 Block diagram of FH/MFSK system 51
3.12 PBNJ of FH system 56
3.13 Block diagram of the system 59
4.1 Setup of frequency measurement 60
4.2 Maximum-Hold of frequency sweeps 60
4.3 Adjacent channel power (ACP) measurement 62
4.4 Channel power -79.81dBm with -142.82dBm/Hz density 63
4.5 Occupied bandwidth 2.926MHz 64
4.6 Emission bandwidth 914.9 kHz 65
4.7 Emission bandwidth 2.032MHz 65
4.8 Emission bandwidth 2.234MHz 66
4.9 Original bit stream 67
4.10 Original bit stream multiplied by PN-sequence 68
4.11 I and Q plots of bit stream with PN-sequence after
69
synchronization and raised cosine filter (1 to 8 Upsampling)
have been applied
4.12 Received data 70
4.13 I and Q waveforms after 8 to 1 down-sampling 71
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