Outline
Review
Wave Parameters
• amplitude • frequency • phase
Propagation and Antennas
Propagation
• fading • fading models • indoor attenuation factors • multipath • diversity • doppler • "the channel" • workbook
Antennas
• near/far fields • basis for 1/2 wavelength • effective area
Time and Frequency
Time/Frequency Relationships
• rectangular pulse • sinc funciton • LAB: Explore rectangular pulse, spectrum, phase changes for timing
Signal Conditioning
• truncated sinc spectrum • raised cosine filter • baseband filtering • LAB: Create pulse train, apply baseband filtering • sampling, sampling rate • A/D bits vs. dynamic range • Nyquist sampling rate • Shannon capacity
Modulation
Analog Modulation
• AM • FM • PM
Digital Modulation
• Modulation types: ASK, PSK, QAM • phasor diagrams • I-Q axes • SNR requirement vs. number of bits/symbol • IQ modulator • LAB: create/plot basic digitally modulated waveforms
Impairments and Testing
Instrumentation
• vector signal analyzer (VSA) • span/sampling frequency relationship • resolution/record length
Measurements
• data displays: constellation, eye diagram, error table • impairment types: phase or amplitude based • IQ modulator impairments • LAB/DEMO: use VSA software to view imparments on recorded signals
Coding and Multiple Access
Coding
• error detection • error correction • effect on SNR requirements
Multiple Access
• FDMA • TDMA • MIMO • OFDMA • LAB: create rudimentary OFDM waveforms using IFFT