CommentID~CommenterName~CommenterEmail~CommenterPhone~CommenterFax~CommenterCo~Clause~Subclause~Page~Line~CommentType~Comment~SuggestedRemedy~Response~CommentStatus~ResponseStatus
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~04~4.1~6~32~T~Numerous references are made to the DS PHY having a channel bandwidth of 22 MHz.  This is not correct.  all current implementations use a SAW filter of about 17 MHz or a LPF of about 8.8 MHz to constrain the emitted spectrum to fit the spectral mask.  Generally speaking the 90% power bandwidth of the signal is around 11 MHz unless artifically processed to expand it.  This is a result of the sinx/x nature of the waveform.  Thus, the actual performance of this simulation will be in error by too pessimistic estimate of the interference potential of the DSSS signal and of the interference rejection of DSSS receivers.~Use the more practical bandwidth of 17 MHz for the signal and use actual SIR ratios that can be measured on any of the existing hardware available.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~04~4.1.4~8~13~T~Numerous references are made to the DS PHY having a channel bandwidth of 22 MHz.  This is not correct.  all current implementations use a SAW filter of about 17 MHz or a LPF of about 8.8 MHz to constrain the emitted spectrum to fit the spectral mask.  Generally speaking the 90% power bandwidth of the signal is around 11 MHz unless artificially processed to expand it.  This is a result of the sinx/x nature of the waveform.  Thus, the actual performance of this simulation will be in error by too pessimistic estimate of the interference potential of the DSSS signal and of the interference rejection of DSSS receivers.~Use the more practical bandwidth of 17 MHz for the signal and use actual SIR ratios that can be measured on any of the existing hardware available.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~05~5.3.5~14~7~E~There is no receive mask and if there were it would have a bandwidth of about 17 MHz, not 22 MHz.~Use the more practical bandwidth of 17 MHz for the receiver.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~05~5.4.1~19~18~E~Why does the 802.15.1 system model have a DBPSK mod?~Remove the DBPSK mod from figure 5.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~05~5.4.2~21~23~E~Why does the 802.11b system model have a GFSK mod?~Remove the GFSK mod from figure 6.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~05~5.4.2.2~23~4~E~Most current implementations use the optimal receiver, so why is the sub-optimum receiver used in the model?~Use the optimal receiver in the model.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~10~10.2.4~50~28~E~Why not use the aCWmin feature like in TGg to reserve time for the WPAN transmissions?  Sending a CTS with a huge duration may break legacy implementations~Consider change to aCWmin style reservation.~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~10~10.4.1~60~22~E~An assumption is made that the PN sequence have sufficient length.  That is a laugh with 11 chips.~Review assumption~~X~O
0~Andren, Carl~candren@intersil.com~321-724-7535~321-223-9657~Intersil~11~11.3~67~38~E~BER_f is to be measured for each frequency.  Commonly, the receivers cannot measure BER, just PER.  Perhaps this is a misprint.~Change BER to PER~~X~O