1. A pressure sore detection system for detecting pressure sores in human tissue comprising: a memory device configured to store a plurality of values corresponding to a plurality of code sequences wherein said plurality of values is located by a plurality of cell addresses; a code selector configured to select a first code sequence and a second code sequence from said plurality of code sequences during operation of said pressure sore detection system and wherein said code selector changes from said first code sequence to said second code sequence during said operation of said pressure sore detection system; an address sequencer coupled to said memory device and said code selector configured to provide cell addresses from said plurality of cell addresses corresponding to said first selected code sequence and said second selected code sequence; a signal generator coupled to said code selector configured to generate a first digital modulation signal and second digital modulation signal representing said first selected code sequence and said second selected code sequence; an optical illumination source of a first wavelength coupled to said signal generator configured to receive said first digital modulation signal and said second digital modulation signal and configured to transmit a first modulated optical signal of said first wavelength along an optical transmission path to said human tissue in response to said first digital modulation signal and transmit a second modulated optical signal of said first wavelength along said optical transmission path to said human tissue in response to said second digital modulation signal; a detector configured to be optically coupled to said human tissue configured to receive said first and second modulated optical signal after transmitting to said human tissue; a second signal generator configured to generate a third digital modulation signal representing a third code sequence, wherein said third code sequence and said second code sequence have the same ordering of code elements and begin at different code elements; a second optical illumination source of a second wavelength coupled to said second signal generator configured to receive said third digital modulation signal and configured to transmit a third modulated optical signal of said second wavelength to said human tissue in response to said third digital modulation signal; a processor coupled to said detector configured to derive a plurality of temporal transfer characteristics for said first, second and third modulated optical signals and configured to detect said pressure sores based on said temporal transfer characteristics; and a blinking indicator coupled to said processor configured to increase alert level by adjusting frequency of blinking based upon detection of said pressure sores.