1. 2.4-GHZ RF TRANSCEIVER FOR IEEE 802.11B WIRELESS LAN UF# 1593 6620 UF# 1593 6620

2. Objective: Design of a system level 2.4 GHz RF- transceiver for wireless LAN Design of a system level 2.4 GHz RF- transceiver for wireless LAN Software used: Software used: Ansoft Ansoft Syscal Syscal MatLab MatLab

3. IEEE 802.11b Specifications Receiver: Receiver: Frequency range: 2.4 – 2.4835 GHz Frequency range: 2.4 – 2.4835 GHz Bit Rate: 1/2/5.5/11 Mb/s Bit Rate: 1/2/5.5/11 Mb/s BW: 22 MHz BW: 22 MHz Sensitivity: -80/-76 dBm Sensitivity: -80/-76 dBm FER: 8% FER: 8% Adjacent channel Rej: 41 dB Adjacent channel Rej: 41 dB Max Power level: -15 dBm Max Power level: -15 dBm Receiver NF: 8.3 dB Receiver NF: 8.3 dB

4. Transmitter: Transmitter: Max transmit power: 30 dBm Max transmit power: 30 dBm Transmit Spectrum mask Transmit Spectrum mask f c = 0 dBr f c = 0 dBr f c -22MHz <f < f c -11MHz -30 dBr f c -22MHz <f < f c -11MHz -30 dBr f c - 11MHz < f < f c +22MHz -30 dBr f c - 11MHz < f < f c +22MHz -30 dBr f < fc-22MHz -50 dBr f < fc-22MHz -50 dBr f > fc+22MHz -50 dBr f > fc+22MHz -50 dBr Center frequency tolerance:+/- 25 MHz Center frequency tolerance:+/- 25 MHz

5. Transmitter Architecture

6.  Transmitter Specifications: a) o/p power spectrum : -15 dBm b) 11 Mb/s CCK modulation c) 1 Mb/s Data rate d) Barker Code: 10110111000

7. Specification of parts used in TX IF Mixer: IF Mixer: AD8343 AD8343 Conversion Gain: 7.1 dB Conversion Gain: 7.1 dB Input IP3: 16.5 dBm Input IP3: 16.5 dBm LO power: 20 dbm LO power: 20 dbm Noise Figure: 14.1 dB Noise Figure: 14.1 dB Input P1 dB: 2.8 dB Input P1 dB: 2.8 dB IF-SAW filter IF-SAW filter : : Center Frequency: 300 MHz. Stopband Rejection: 53 dB. Insertion Loss: 4.5 dB

8. RF Mixer: RF Mixer: HMC400MS8 HMC400MS8 Conversion Loss: 8.8 dB Conversion Loss: 8.8 dB Input IP3: 35 dBm Input IP3: 35 dBm LO power: 18 dBm LO power: 18 dBm Noise Figure: 8.8 Noise Figure: 8.8 Input P1 dB: 22 dBm Input P1 dB: 22 dBm RF- Band Pass Filter: RF- Band Pass Filter: Insertion Loss: 1.1 dB Insertion Loss: 1.1 dB Center Frequency: 2400 MHz. Center Frequency: 2400 MHz. Attenuation at cutoff frequencies: 50 dB Attenuation at cutoff frequencies: 50 dB  Power amplifiers:  HMC287MS8  HMC287MS8 Gain: 21 dB Gain: 21 dB Noise Figure: 2.2 dB Noise Figure: 2.2 dB OP3: 7 dBm OP3: 7 dBm OP1: 3 dBm OP1: 3 dBm  GBH120_214  GBH120_214 Gain: 18 dB Gain: 18 dB IP3: 33 dBm IP3: 33 dBm Noise Figure: 4.5 dB Noise Figure: 4.5 dB

9. Transmit Spectrum

10. Constellation at TX Output

11. Receiver Architecture

12. Specifications of the parts used in RX RF- Band Pass Filter RF- Band Pass Filter : : Insertion Loss: 1.1 dB Insertion Loss: 1.1 dB Center Frequency: 2400 MHz. Center Frequency: 2400 MHz. Attenuation at cutoff frequencies: 50 dB Attenuation at cutoff frequencies: 50 dB Mixer Mixer HMC400MS8 HMC400MS8 Conversion Loss: 8.8 dB Conversion Loss: 8.8 dB Input IP3: 35 dBm Input IP3: 35 dBm LO power: 18 dBm LO power: 18 dBm Noise Figure: 8.8 Noise Figure: 8.8 Input P1 dB: 22 dBm Input P1 dB: 22 dBm  LNA HMC287MS8 HMC287MS8 Gain: 21 dB Noise Figure: 2.2 dB OP3: 7 dBm OP1: 3 dBm  IF-SAW filter : Center Frequency: 300 MHz. Stopband Rejection: 53 dB. Insertion Loss: 4.5 dB

13. AD8343 AD8343 Conversion Gain: 7.1 dB Conversion Gain: 7.1 dB Input IP3: 16.5 dBm Input IP3: 16.5 dBm LO power: 20 dbm LO power: 20 dbm Noise Figure: 14.1 dB Noise Figure: 14.1 dB Input P1 dB: 2.8 dB Input P1 dB: 2.8 dB Low Pass Filter Low Pass Filter Insertion Loss: 3 dB Insertion Loss: 3 dB Pass band: 0-18 MHz Pass band: 0-18 MHz Rejection: 50 dB Rejection: 50 dB Stop band: 19.1 to 100 MHz. Stop band: 19.1 to 100 MHz. VSWR: 1.5:1 VSWR: 1.5:1

14. Receiver Requirements SNR SNR FER = 8  10 -2 1 Frame = 1024  8 bits FER = 8  10 -2 1 Frame = 1024  8 bits Let F be the probability that a frame is received correctly, F100 = 0.92 Let (1-P) be the probability a bit is in error P1024*8 = F P = 0.92(1/ (1024*8*100)) 1-P = 1.01  10-7 Therefore, BER = 1.01  10-7 E/N = (erfinv (1-2*BER)) ^2 E/N = 13.5 dB S/N = 13.5-3 S/N = 10.5 dB Adhering to a stricter margin, the S/N can be decided to be 12.3 dB

15. Noise Figure Noise Figure Sensitivity = NF + SNR + Noise Floor. -80 = -174 + 10×log (22×106) +12+NF NF = 8.3 dB The noise figure of the receiver should be <= 8.3 dB. IIP3 IIP3 Adjacent channel carrier power= sensitivity+41 dB Carrier power of channel of interest = sensitivity+6 dB Therefore the MDS (minimum discernable signal) is –80+6-SNR= -80+6-10.5 = -84.5 -80+6-10.5 = -84.5 Carrier power of adjacent channel = -80+41= -39 IIP3 = -39 + (-39-(-84.5))/2 = -16.25 Therefore IIP3 for a receiver should be higher than –16.25.

16. Link Budget Analysis (Syscal)

17. IIP3 IIP3 From the previous figure, we find the IIP3 of the receiver to be -16.13 dBm, which is >-16.35 dBm From the previous figure, we find the IIP3 of the receiver to be -16.13 dBm, which is >-16.35 dBm Noise Figure Noise Figure The NF of the receiver system is 8.46 dB The NF of the receiver system is 8.46 dB

18. Variation of parameters with probe location

20. Summary-Transceiver Specifications Heterodyne Architecture: Heterodyne Architecture: IF=300 MHz, RF=2.4 GHz IF=300 MHz, RF=2.4 GHz Transmitter Specifications Transmitter Specifications Data Rate = 1 Mb/s interleaved on 11 Mb/s Barker Code Data Rate = 1 Mb/s interleaved on 11 Mb/s Barker Code O/P Power = -15 dBm O/P Power = -15 dBm Receiver Specifications Receiver Specifications Noise Figure = 8.46 dB Noise Figure = 8.46 dB Gain = 20.20 Gain = 20.20 OIP3 = 4.07 dBm OIP3 = 4.07 dBm Min SNR = 12.3 Min SNR = 12.3