為了在CDMA系統中更好地應用QDPSK數字調制方式，在分析四相相對移相（QDPSK)信號調制解調原理的基礎上，設計了一種QDPSK調制解調電路，它包括串并轉換、差分編碼、四相載波產生和選相、相干解調、差分譯碼和并串轉換電路。在MAX+PLUSⅡ軟件平臺上，進行了編譯和波形仿真。綜合后下載到復雜可編程邏輯器件EPM7128SLC84-15中，測試結果表明，調制電路能正確選相，解調電路輸出數據與QDPSK調制輸入數據完全一致，達到了預期的設計要求。
Abstract:
In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference deCoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
針對UHF讀寫器設計中，在符合EPC Gen2標準的情況下，對標簽返回的高速數據進行正確解碼以達到正確讀取標簽的要求，提出了一種新的在ARM平臺下采用邊沿捕獲統計定時器數判斷數據的方法，并對FM0編碼進行解碼。與傳統的使用定時器定時采樣高低電平的FM0解碼方法相比，該解碼方法可以減少定時器定時誤差累積的影響；可以將捕獲定時器數中斷與數據判斷解碼相對分隔開，使得中斷對解碼影響很小，實現捕獲與解碼的同步。通過實驗表明，這種方法提高了解碼的效率，在160 Kb/s的接收速度下，讀取一張標簽的時間約為30次/s。
Abstract:
Aiming at the requirement of receiving correctly decoded data from the tag under high-speed communication which complied with EPC Gen2 standard in the design of UHF interrogator， the article introduced a new technology for FM0 deCoding which counted the timer counter to judge data by using the edge interval of signal capture based on the ARM7 platform. Compared with the traditional FM0 deCoding method which used the timer timed to sample the high and low level， the method could reduce the accumulation of timing error and could relatively separate capture timer interrupt and the data judgment for deCoding， so that the disruption effect on the deCoding was small and realizd synchronization of capture and deCoding. Testing result shows that the method improves the efficiency of deCoding， at 160 Kb/s receiving speed， the time of the interrogator to read a tag is about 30 times/s.
為了在CDMA系統中更好地應用QDPSK數字調制方式，在分析四相相對移相（QDPSK)信號調制解調原理的基礎上，設計了一種QDPSK調制解調電路，它包括串并轉換、差分編碼、四相載波產生和選相、相干解調、差分譯碼和并串轉換電路。在MAX+PLUSⅡ軟件平臺上，進行了編譯和波形仿真。綜合后下載到復雜可編程邏輯器件EPM7128SLC84-15中，測試結果表明，調制電路能正確選相，解調電路輸出數據與QDPSK調制輸入數據完全一致，達到了預期的設計要求。
Abstract:
In order to realize the better application of digital modulation mode QDPSK in the CDMA system， a sort of QDPSK modulation-demodulation circuit was designed based on the analysis of QDPSK signal modulation-demodulation principles. It included serial/parallel conversion circuit, differential encoding circuit, four-phase carrier wave produced and phase chosen circuit, coherent demodulation circuit, difference deCoding circuit and parallel/serial conversion circuit. And it was compiled and simulated on the MAX+PLUSⅡ software platform,and downloaded into the CPLD of EPM7128SLC84-15.The test result shows that the modulation circuit can exactly choose the phase，and the output data of the demodulator circuit is the same as the input data of the QDPSK modulate. The circuit achieves the prospective requirement of the design.
One of the most important issues affecting
the implementation of microcontroller
software deals with the data-decision
algorithm. Data-decision refers to deCoding
the DIO-pin from the CC400/CC900. Two
main principles exist for deCoding
Manchester-coded data: Data decision
based on timing the period between
transitions, and data decision based on
oversampling.
I. Introduction
This code exploits a previously undisclosed vulnerability in the bit string
deCoding code in the Microsoft ASN.1 library. This vulnerability is not related
to the bit string vulnerability described in eEye advisory AD20040210-2. Both
vulnerabilities were fixed in the MS04-007 patch.
II. Screenshots
$ ./kill-bill.pl
. kill-bill : Microsoft ASN.1 remote exploit for CAN-2003-0818 (MS04-007)
by Solar Eclipse <solareclipse@phreedom.org>
Usage: kill-bill -p <port> -s <service> host
Services:
iis IIS HTTP server (port 80)
iis-ssl IIS HTTP server with SSL (port 443)
exchange Microsoft Exchange SMTP server (port 25)
smb-nbt SMB over NetBIOS (port 139)
smb SMB (port 445)
If a service is running on its default port you don t have to
specify both the service and the port.
Examples: kill-bill -s iis 192.168.0.1
kill-bill -p 80 192.168.0.1
kill-bill -p 1234 -s smb 192.168.0.1
The two C source files in this archive are specific to the TRS-80 Model 4 with
high-resolution graphics board. However, the code which performs Huffman enco-
ding and deCoding is of general interest.
The two C source files in this archive are specific to the TRS-80 Model 4 with
high-resolution graphics board. However, the code which performs Huffman enco-
ding and deCoding is of general interest.
