Raised Cosine Pulse Shaping for Pre-equalized Optical Wireless Links

Their programmability means that digital pre-equalization techniques are more flexible than analog circuit equalizers. However, their performance depends on the number of samples per data symbol needed to accurately represent pre-equalized time domain pulse. This requirement limits maximum rate can be generated by a digital-to-analog converter (DAC). Another challenge when pre-equalizing signal applied transmitter is need restrict voltage transmitter. Given these challenges, this paper demonstrates benefits constructing digitally On-Off Keying (OOK) symbols with raised cosine pulses. In addition, results presented which show each represented as few 5 bit. The proposed equalization method investigated using an off-the-shelf LED-based optical wireless communication (OWC) link. Using equalization, bandwidth link increased factor 10 100 MHz. Consequently, achievable 2 GSa/s DAC 400 Mb/s.