Sundaram Vanka is a notable inventor based in Notre Dame, IN (US). He has made significant contributions to the field of communications technology, holding a total of 7 patents. His work primarily focuses on enhancing the performance of OFDM (Orthogonal Frequency Division Multiplexing) receivers.

Latest Patents

One of his latest patents is a "Channel estimation filter for OFDM receiver." This invention involves a channel smoothing filter with a finite impulse response (FIR) that utilizes a controller to read parallel sample data from an FFT memory. The design generates an even function, applying the sample data to a preamble equalizer, which is accompanied by a preamble sign and zero. The outputs from the preamble are coupled to three filter processors, each equipped with four filter engines whose outputs are summed. The channel smoothing filter produces a register output, with the register input connected to a summer that incorporates inputs from the first filter processor shifted by four, the second filter processor shifted by two, the third filter processor, and the register output. Coefficients for an edge filter and a central filter are provided in Zero Sign Shift (ZSS) format, and the selection of coefficients is achieved using a canonical signed digit (CSD) algorithm, eliminating the need for multipliers in the channel smoothing FIR filter.

Another significant patent is "Stream weight estimation and compensation in SIMO/MIMO OFDM receivers." This process equalizes streams of OFDM subcarrier data by computing the noise variance for each stream. It forms a stream weighting coefficient by equalizing the noise variance, ensuring that for a first stream with a noise variance of σ and a second stream with a noise variance of σ, the first stream is scaled accordingly while the second stream is also scaled.

Career Highlights

Sundaram Vanka is currently employed at Redpine Signals, Inc., where he continues to innovate in the field of wireless communications. His expertise in OFDM technology has positioned him as a key contributor to advancements in this area.

Collaborations

He has collaborated with talented coworkers such as Partha Sarathy Murali and Phanimithra Gangalakurthi, further enhancing the innovative environment at Redpine Signals, Inc.

Conclusion

Sundaram Vanka's contributions to

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