Digital Signal Processing Reference
In-Depth Information
TABLE 7.1
Typical DSP Applications
Algorithm
Equation
M
∑
0
Finite impulse response filter
yn
()
=
a xn k
k
(
−
)
k
=
M
N
∑
∑
Infinite impulse response filter
yn
()
=
a xn k
(
−
)
+
byn k
(
−
)
k
k
k
=
0
k
=
1
N
∑
0
Convolution
yn
()
=
xkhn k
()(
−
)
k
=
−
∑
N
1
Discrete Fourier transform
Xk
()
=
xn
()exp[ (
−
j
2
π
/ ) ]
Nnk
n
=
0
−
∑
N
1
⎡
⎢
⎤
⎥
2
()
=
(
)
Discrete cosine transform
Fu
cu fx
( .( .cos
N
ux
21
+
x
=
0
by Texas Instruments (TI). These DSP chips will be interfaced through Code
Composer Studio (CCS) software developed by TI.
7.1.2.1 Evolution of Texas Instruments TMS320 DSP Chips
In 1983, Texas Instruments (TI) released their first generation of DSP chips,
the TMS320 single-chip DSP series. The first generation chips (C1x family)
could execute an instruction in a single 200-nanosecond (ns) instruction
cycle. The current generation of TI DSPs includes the C2000, C5000, and
C6000 series, which can run up to eight 32-bit parallel instructions in one
6.67-ns instruction cycle, for an instruction rate of more than 1 GHz. The
C2000 and C5000 series are fixed-point processors, while the C6000 series
contains both fixed-point and floating-point processors. For this lab, we will
be using the C6711 processor, the only C6000 series floating-point processor.
2
The C2000 and C5000 series of chips are used primarily for digital control.
They consume very little power and are used in many portable devices
including 3G (third generation) cell phones, GPS (global positioning system)
receivers, portable medical equipment, and digital music players. Due to
their low power consumption (40 mW to 160 mW of active power), they are
very attractive for power-sensitive portable systems. The C6000 series of
chips provides both fixed- and floating-point processors that are used in
systems that require high performance. Because these chips are not as power
efficient as the C5000 series of chips (0.5 W to 1.4 W of active power), they
are generally not used in portable devices. Instead, the C6000 series of chips
is used in high quality digital audio applications, broadband infrastructure,
