Qualcomm Inc (QCOM)

[Jim Mullens]

Re: Rysavy- HSDPA & Beyond for 3GAmericas / GSMA cronies / devotees

Distortions / Contortions- or:

If you can’t dazzle ‘em with brilliance, baffle ‘em with BS , and throw in a little character assignation to boot (or blatantly attempt to distort... /or failing to differentiate, or being incapable or unwilling to differentiate)”

1. Reference my prior post on the subject >>>>


The recent Rysavy HSDPA white paper “developed for 3G Americas “ (IOW- GSM/GSMA) also appears to distort EV-DO RevA performance with Table 1, page 9.

Average User Throughputs for File Downloads

UMTS- HSDPA..............550- 1100 kbps
EV-DO............................400-700
EV-DO Rev A................Slightly improved over EV-DO

<<<<<<<<<<<<<<<<<<

As I’ve stated before (no doubt obvious to most), I’m no technologist. And, perhaps I’m way off base and missing something here, but it appears that Rysavy’s own data proves my point (appears to distort EV-DO RevA performance) -

+ Table 1 (Comparison of Capabilities of Technologies)

...............Average User Throughputs for File Downloads

..................UMTS- HSDPA..............550- 1100 kbps
..................EV-DO............................400-700
..................EV-DO Rev A................Slightly improved over EV-DO


+ Figure 14 (Comparison of Downlink Spectral Efficiency)

Table 1 reflects EV-DO between 72% to 64% as efficient as HSDPA (and EV-DO RevA (slightly improved over EV-DO). Yet Figure 14 depicts the Downlink Spectral Efficiency (bps/Hz/section) for all three Wireless Technologies roughly the same-

..... HSDPA..............0.63
..... EV-DO.............. 0.60 ........95% as efficient as HSDPA
..... EV-DO Rev A......0.62........98% as efficient as HSDPA


2. Reference >>> 3G Americas HSDPA Whitepaper

The white paper, Data Capabilities: GPRS to HSDPA and Beyond is available for free download at the 3G Americas' website: www.3gamericas.org.