Telecom/Wireless (Layer1) Design Consultant
Design/Coaching/Pre-Selection Interviews
I have Master Degree in Communication with over TEN years experience in Embedded Firmware of which more than three years with reputed telecom companies in US like 3 Com and Analog Devices.I have exposure to ISO procedures and have team leader experience.
At present I give online coaching in Digital Signal Processing(DSP)Applications to wireless for BE/ME (ECE/EEE/CS)students for nominal charge of Rs 10000 /6 month practical course.
The student must have motivation to learn DSP and should have very good programming skill.
My area of expertise is Digital Signal Processing.I have experience in packages like MATLAB and ADSP21XX,TIC54X Assemblers.I have designed a DSP based speech scrambler.
Algorithms:LMS,Kalman,FFT,MAP,Viterbi
Standards:V.22bis,V.34,GSM,ADSL,OFDM
I have worked on Co-Channel Interference mitigation for GSM with Kalman based Channel estimation,MAP/Viterbi based equalization.
Present Work
At present I am working on Digital Video Broadcasting DVB-H of ETSI EN 300 744 standard.The job involves understanding the ETSI standard and system design (Complete physical layer work including selection of RF front end,selecting the suitable DSP algorithms etc.) .
The simulation of Coarse time synchronization,fine and and integer frequency offset ,ADC sampling clock and residual frequuency offset tracking have been implemented.The tasks involve design of residual and sampling clock offset error detector,Loop filter and interpolator to correct sampling clock offset and Channel Estimation using pilots.
Simulation have been done for mobile Typical Urban channel and BER estimates obtained.
Design of Viterbi and Reedsolomon decoder are the present tasks.
Speech Scrambler:
Type:Analogue Scrambler using Transform domain technique
Radio Interface:HF/VHF with SSB modulation
Samples/Frame:256
Sampling Frequency:8 Khz
Channel Model:Watterson
Maximum Doppler: 1Hz
Delay Spread:1 msec
Frequency Offset:+/-32 Hz
Synchronization:PN Sequence
Equalization:Adptive Algorithm using PN sequence training
Scrambled Speech
Descrambled Speech
CCI Mitigation for GSM:
Channel Taps: Three
CCI Interferers:One
Normalized Doppler:0.001
Channel Model:TUx with Exponential and Uniform Power Delay Profiles
Channel Estimation:Kalman
My Resume:
I can takeup frelancing Physical Layer design work.I can impart advanced training to Engineering students in LIVE projects.I can also help companies in getting right candidate in the Digital Signal Processing domain by conducting pre-selection interviews.I am looking for venture capital tieups for my DVB-H (ETSI) project.
I am looking for partners with strong DSP background and willingness to work hard.
EMail: Murali_Mannai@rediffmail.com
Mannai_Murali@hotmail.com
Phone:(91)-80-23450258
Cell: (91)-9480336605
763,1 B Cross,Muthyalamma Nagar,
Gokula,Bangalore-560054
INDIA