The original IEEE 802.1 l used DSSS with the 11 chip Barker code given by {1,-1,1,1,-1,1,1,1,-1,-1,-1} a) What is the processing gain of the system in dB? b) Sketch and label the periodical and linear autocorrelation function of the code used in the standard c) If we use a PN-sequence with processing gain of 11 (similar to Barker code) to implement a CDMA system, what is the maximum number of simultaneous users we can have? Assume a minimum acceptable signal to interference ration of 8dB, a data application (no voice activity benefit), an Omni directional antenna (no sector antenna benefit), and a single access point (no interference from other cells)? d) If we assign all of these CDMA code to one user, what would be the data rate of the new system, if the original single code user was running at 2 Mbps. How does this system compare with the 802.11b CCK code which supports 11 Mbps.