This project aim was to build wireless software modem for data communication between two computers using an acoustic interface in the voice frequency range (20Hz– 20,000Hz). The transmitting antenna is a speaker (frequency response of: 90Hz – 20,000Hz) and the receiving antenna is a microphone (frequency response of: 100Hz – 16,000Hz). The test files used as information files were text files. This goal was attained both in an incoherent scheme and in a coherent scheme. Build under Matlab code, our modem uses OFDM (orthogonal frequency division multiplexing) modulation, synchronization by LMS sequence, channel estimation (no equalizer) via pilot tones. The symbols are either PSK or ASK for a constellation size of 2 or 4. To optimize the probability of error, these symbols were mapped using Gray mapping. Report
標簽： communication computers software wireless
上傳時間： 2014-05-29
上傳用戶：wangdean1101
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video.
標簽： bottleneck developed the concept
上傳時間： 2014-12-03
上傳用戶：ikemada
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. Hardware reference
標簽： bottleneck developed the concept
上傳時間： 2016-03-18
上傳用戶：極客
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. User Manual
標簽： bottleneck developed the concept
上傳時間： 2014-01-15
上傳用戶：努力努力再努力
The Fuzzy Clustering and Data Analysis Toolbox is a collection of Matlab functions. Its propose is to divide a given data set into subsets (called clusters), hard and fuzzy partitioning mean, that these transitions between the subsets are crisp or gradual.
標簽： Clustering collection functions Analysis
上傳時間： 2016-03-19
上傳用戶：1427796291
Data mining (DM) is the extraction of hidden predictive information from large databases (DBs). With the automatic discovery of knowledge implicit within DBs, DM uses sophisticated statistical analysis and modeling techniques to uncover patterns and relationships hidden in organizational DBs. Over the last 40 years, the tools and techniques to process structured information have continued to evolve from DBs to data warehousing (DW) to DM. DW applications have become business-critical. DM can extract even more value out of these huge repositories of information.
標簽： information extraction predictive databases
上傳時間： 2016-03-19
上傳用戶：啊颯颯大師的
AN2285-Data Movement between Big and Little Endian Devices
標簽： Movement Devices between Little
上傳時間： 2014-12-04
上傳用戶：chongcongying
DPSS. CALCULATES DISCRETE PROLATE SPHEROIDAL SEQUENCES FOR USE AS DATA TAPERS. Source from statlib.
標簽： CALCULATES SPHEROIDAL SEQUENCES DISCRETE
上傳時間： 2013-12-20
上傳用戶：wendy15
這個工具集提供以下結(jié)構化分析和UML分析中所用的圖形化繪圖工具：ER-diagrams, data and event flow diagrams and state-transition diagrams，class-diagram editor, a use-case diagram editor and an activity diagram editor
標簽： state-transition ER-diagrams and diagrams
上傳時間： 2014-12-09
上傳用戶：qunquan
Efficient frontier from Yahoo or database data.
標簽： Efficient frontier database Yahoo
上傳時間： 2016-03-24
上傳用戶：181992417
